frigicoll MIH22Q1N18 One Way Cassette Owner’s Manual

MIH22Q1N18 One Way Cassette

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Specifications:

• Model Numbers: MIH22Q1N18 (KCOF-22 DN5.0), MIH36Q1N18 (KCOF-36
  DN5.0), MIH71Q1N18 (KCOF-71 DN5.0)

• Installation Type: One Way Cassette

• Refrigerant: Flammable refrigerant

• Language: English (translations available)

Product Usage Instructions:

Installation:

Before starting the installation process, carefully read and
understand the safety instructions provided in the manual to
prevent any potential risks to health or property.

Installation Precautions:

Follow the step-by-step installation guide provided in the
manual. Ensure that all safety signs and symbols are noted and
adhered to during installation to avoid any accidents.

Preparations Before Installation:

Prior to installation, gather all necessary installation
materials as listed in the manual. Make sure you have all tools and
components required for a successful installation.

Indoor Unit Installation:

Install the indoor unit following the detailed instructions in
the manual. Properly position and secure the unit according to the
guidelines provided.

Refrigerant Connecting Piping Installation:

Connect the refrigerant piping as per the instructions provided.
Handle the flammable refrigerant with caution to prevent any leaks
or potential fire hazards.

Electrical Connection:

Ensure all electrical connections are made by a qualified
professional following the electrical safety requirements outlined
in the manual.

Maintenance and Service:

Cleaning:

Regularly clean the unit as instructed to maintain optimal
performance. Follow the cleaning guidelines provided in the manual
to ensure efficient operation.

Service:

For any servicing needs, contact a qualified service personnel
to handle repairs or maintenance tasks. Do not attempt to service
the unit yourself to avoid any risks.

FAQ:

Q: Can I install the unit myself?

A: It is recommended to have the unit installed by authorized
installers or trained professionals to ensure proper setup and
safety compliance.

Q: What should I do in case of an error code?

A: Refer to the error code section in the manual for
troubleshooting steps. If issues persist, contact a service
technician for assistance.

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INSTALLATION AND OWNER’S MANUAL
One Way Cassette
MIH22Q1N18 (KCOF-22 DN5.0) MIH36Q1N18 (KCOF-36 DN5.0) MIH71Q1N18 (KCOF-71 DN5.0)
Read this manual carefully before using the product, and keep it for future reference. All the pictures in this manual are for illustration purpose only.

Contents

About The Documentation
About This Document / 1 Specific Installer Safety Instructions / 2
Safety Warning
Safety Precautions / 3 About The Refrigerant / 5

1
3 Electric Safety Requirements / 4

Operation
Operation Precautions / 8 Symptoms That Are Not Faults / 10 Disposal / 13

8 Optimum Operation / 9 Display Panel (Optional) / 13

Installation

14

Installation Precautions / 14

Installation Materials / 20

Preparations Before Installation / 22

Indoor unit Installation / 27

Refrigerant Connecting Piping Installation / 33 Drain Pipe Installation / 39

Electrical Connection / 43

Error Codes / 60

Test Run / 65

Maintenance and Service

67

Safety Warning / 67

Cleaning / 67

Service / 70

About The Documentation
1 About This Document
Note
Make sure that the user has the printed documentation and ask him/her to keep it for future reference.
Target audience Authorised installers + end users
Note
This appliance is intended to be used by expert or trained users in shops, in light industry, and on farms, or for commercial and household use by lay persons.
Warning
Please thoroughly read and ensure that you fully understand the safety precautions (including the signs and symbols) in this manual, and follow relevant instructions during use to prevent damage to health or property.
Documentation set This document is part of a documentation set. The complete set consists of: General safety precautions:
Safety instructions that you must read before installing Indoor unit installation and operation manual:
Installation and operation instructions Repeater installation and operation manual:
Installation and operation instructions
Technical engineering data Latest revisions of the supplied documentation may be available via your dealer. The original documentation is written in English. All other languages are translations.

1

About The Documentation

2 Specific Installer Safety Instructions

Please thoroughly read and ensure that you fully understand the safety precautions (including the signs and symbols) in this manual, and follow relevant instructions during use to prevent damage to health or property.
Safety signs

Danger

Indicates a hazard with a high level of risk which, if not avoided, will result in serious injury.

Warning Indicates a hazard with a medium level of risk which, if not avoided, could result in serious injury.

Caution

Indicates a hazard with a low level of risk which, if not avoided, could result in minor or moderate injury.

Note

Useful operation and maintenance information.

Explanation of symbols displayed on the unit

WARNING

This symbol shows that this appliance used a flammable refrigerant. If the refrigerant is leaked and exposed to an external ignition source, there is a risk of fire.

CAUTION This symbol shows that the operation manual should be read carefully.

CAUTION

This symbol shows that a service personnel should be handling this equipment with reference to the installation manual.

CAUTION

This symbol shows that information is available such as the operating manual or installation manual.

Caution: Risk of fire (for IEC 60335-2-40: 2018 only)

Caution: Risk of fire
(for IEC/EN 60335-2-40 except IEC 60335-2-40: 2018)

Note
The symbols above are for R32 refrigerant system.

2

About The Documentation

Safety Warning

Warning

Ensure Proper Grounding

Professional Only

Prohibition signs

No Laying Inflammable Thing

No Strong Currents

1 Safety Precautions

No Open Flame; Fire, Open Ignition Source and
Smoking Prohibited

No Acid or Alkali Materials

Danger

In the event of refrigerant leakage, smoking and open flames are prohibited. Disconnect

the main power switch immediately, open windows to allow ventilation, keep away from the

leakage point, and contact your local dealer or technical support to request a professional

OFF

repair.

Warning
Air conditioner installation must comply with local standards and electrical codes, and relevant instructions in this manual.
Do not use any liquid cleanser, liquefied cleanser, or corrosive cleanser to wipe this unit or spray water or other liquids on the unit. Otherwise, the plastic parts of the unit will become damaged and an electrical shock may occur. Disconnect the main power switch before cleaning and maintenance to avoid accidents.
Ask a professional to remove and reinstall the air conditioner.
Ask a professional for maintenance and repair assistance.
This air conditioner is classified as an “appliance which is not accessible to the general public”.
The indoor unit shall be placed at a height not accessible to children, at least 2.5m above the ground.

Indoor unit
2.5m

3

Safety Warning

Caution
This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision. This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for commercial use by lay persons. When the product is used for comercial application. This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for commercial use by lay persons. The sound pressure level is below 70 dB(A).
2 Electric Safety Requirements
Warning
The air conditioner shall be installed according to the local wiring specifications. Wiring work must be completed by qualified electricians. The air conditioner must be well grounded. Specifically, the main switch of the air conditioner must have a reliable grounding cable. Before contacting wiring devices, cut off all the power supplies. The user MAY NOT disassemble or repair the air conditioner. Doing so can be dangerous. In the event of a fault, immediately cut off the power and contact your local dealer or technical support. A separate power supply that meets the rated parameter values must be provided for the air conditioner. The fixed wiring to which the air conditioner is connected must be equipped with a power cut-off device that meets the wiring requirements. The air conditioner’s circuit board (PCB) is designed with a fuse to provide overcurrent protection. The specifications of the fuse are printed on the circuit board. NOTE: For the units with R32 refrigerant, only the blast-proof ceramic fuse can be used.
Caution
Under no circumstances should the earth wires of the power supply system be disconnected. Do not use a damaged power cable and replace it if it is damaged. When the air conditioner is used for the first time or is in a power- off state for a long time, it needs to be connected to the power supply and warmed up for at least 12 hours before use.

4

Safety Warning

3 About The Refrigerant

Warning
The following applies to R32 refrigerant systems.
Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.
For repair to the refrigerating system, the following precautions shall be complied with prior to conducting work on the system.
Work shall be undertaken under a controlled procedure so as to minimise the risk of a flammable gas or vapour being present while the work is being performed.
All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out. Work in confined spaces shall be avoided. The area around the workspace shall be sectioned off. Ensure that the conditions within the area have been made safe by control of flammable material.
The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially flammable atmospheres.
Ensure that the leak detection equipment being used is suitable for use with flammable refrigerants, i.e. nonsparking, adequately sealed or intrinsically safe.
If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing equipment shall be available to hand. Have a dry powder or CO2 fire extinguisher adjacent to the charging area.
No person carrying out work in relation to a refrigeration system which involves exposing any pipe work that contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may lead to the riskof fire or explosion.
All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during which flammable refrigerant can possibly be released to the surrounding space.
Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. “No Smoking” signs shall be displayed.
Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.
Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times the manufacturer’s maintenance and service guidelines shall be followed. If in doubt consult the manufacturer’s technical department for assistance.
The following checks shall be applied to installations using flammable refrigerants: ­ the charge size is in accordance with the room size within which the refrigerant containing parts are installed; ­ the ventilation machinery and outlets are operating adequately and are not obstructed; ­ if an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of refrigerant; ­ marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected; ­ refrigeration pipe or components are installed in a position where they are unlikely to be exposed to any substance which may corrode refrigerant containing components, unless the components are constructed of materials which are inherently resistant to being corroded or are suitably protected against being so corroded.
Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures.
If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are advised.
Initial safety checks shall include: -that capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking; -that no live electrical components and wiring are exposed whiule charging, recovering or purging the system; -that there is continuity of earth bonding.

5

Safety Warning

During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal of sealed covers, etc. If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous situation.
Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not altered in such a way that the level of protection is affected. This shall include damage to cables, excessive number of connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc.
Ensure that seals or sealing materials have not degraded such that they no longer serve the purpose of preventing the ingress of flammable atmospheres.
Replacement parts shall be in accordance with the manufacturer’s specifications.
Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use.
Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere. The test apparatus shall be at the correct rating.
Replace components only with parts specified by the manufacturer. Other parts may result in the ignition of refrigerant in the atmosphere from a leak.
Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects. The check shall also take into account the effects of ageing or continual vibration from sources such as compressors or fans.
When breaking into the refrigerant circuit to make repairs ­ or for any other purpose ­ conventional procedures shall be used. However, it is important that best practice is followed.
Since flammability is a consideration. The following procedure shall be adhered to: · remove refrigerant; · purge the circuit with inert gas; · evacuate; · purge again with inert gas; · open the circuit by cutting or brazing.
The refrigerant charge shall be recovered into the correct recovery cylinders. The system shall be “flushed” with OFN to render the unit safe. This process may need to be repeated several times. Compressed air or oxygen shall not be used for this task.
Flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill until the working pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum.
This process shall be repeated until no refrigerant is within the system. When the final OFN charge is used, the system shall be vented down to atmospheric pressure to enable work to take place.
This operation is absolutely vital if brazing operations on the pipe-work are to take place.
Ensure that the outlet for the vacuum pump is not close to any ignition sources and there is ventilation available.
Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or lines shall be as short as possible to minimise the amount of refrigerant contained in them.
Prior to recharging the system it shall be pressure tested with OFN.
DD.12 Decommissioning:
Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of reclaimed refrigerant. It is essential that electrical power is available before the task is commenced. a) Become familiar with the equipment and its operation. b) Isolate system electrically. c) Before attempting the procedure ensure that:
· mechanical handling equipment is available, if required, for handling refrigerant cylinders; · all personal protective equipment is available and being used correctly; · the recovery process is supervised at all times by a competent person; · recovery equipment and cylinders conform to the appropriate standards. d) Pump down refrigerant system, if possible. e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system. f) Make sure that cylinder is situated on the scales before recovery takes place. g) Start the recovery machine and operate in accordance with manufacturer’s instructions. h) Do not overfill cylinders. (No more than 80 % volume liquid charge).

6

Safety Warning

i) Do not exceed the maximum working pressure of the cylinder, even temporarily. j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed off. k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.
Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant. The label shall be dated and signed. Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant.
When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all refrigerants are removed safely.
When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct number of cylinders for holding the total system charge are available. All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant (i.e. special cylinders for the recovery of refrigerant). Cylinders shall be complete with pressure relief valve and associated shut-off valves in good working order. Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs.
The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of flammable refrigerants. In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall be complete with leak-free disconnect couplings and in good condition. Before using the recovery machine, check that it is in satisfactory working order, has been properly maintained and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt.
The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant Waste Transfer Note arranged. Do not mix refrigerants in recovery units and especially not in cylinders.
If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that flammable refrigerant does not remain within the lubricant. The evacuation process shall be carried out prior to returning the compressor to the suppliers. Only electric heating to the compressor body shall be employed to accelerate this process. When oil is drained from a system, it shall be carried out safely.
Warning: disconnect the appliance from its power source during service and when replacing parts.
These units are partial unit air conditioners, complying with partial unit requirements of this International Standard, and must only be connected to other units that have been confirmed as complying to corresponding partial unit requirements of this International Standard.

7

Safety Warning

Operation

1 Operation Precautions

Warning
If the unit will be not used for a long time, disconnect the main power switch. Otherwise, an accident may occur.
The installation height of the air conditioner shall be at least 2.5m above the ground to avoid the following risks:
1. Touching of moving or live parts, such as fans, motors, or louvers, by a non professional. Running parts may cause harm to you or transmission assemblies may become damaged.
2. Getting too close to the air conditioner may reduce the level of comfort.
When the product is used with a burning appliance, the room must be ventilated regularly. Otherwise, it may cause an insufficient oxygen supply.
Do not let children play with the air conditioner. Otherwise, an accident may occur.
Do not expose the indoor units or controller to moisture or water as this may cause short circuiting or fire.
Do not place any appliance that uses an open flame in the direct air supply of the air conditioner as it could interfere with the combustion of the appliance.
Do not use or store flammable gases or liquids such as natural gas, hair spray, paint or gasoline near the air conditioner. Otherwise, a fire may occur.
To avoid causing harm, do not place animals or plants directly in front of the air conditioner’s air supply.
In the event of abnormal conditions such as abnormal noise, smell, smoke, temperature rise, and electric leakage, please cut off the power immediately, and then contact your local dealer or air conditioner customer service center. Do not repair the air conditioner by yourself.
Do not place flammable sprayers near the air conditioner or spray it directly at the air conditioner. Otherwise, a fire may occur.
Do not place a container of water on the air conditioner. If immersed in water, the air conditioner’s electrical insulation will weaken, resulting in electrical shock.
After long-term use, confirm whether the installation platform has become worn. If it is worn, the unit could fall, causing injury.
Do not operate the switch with wet hands, as this may result in electric shock.
When servicing the air conditioner, be sure to turn off the air conditioner and cut off the power supply. Otherwise, the high-speed operation of the internal fan will cause injury.
Do not use fuses like iron or copper wire other than those with the specified capacity. Otherwise, a malfunction or fire may occur. The power supply must use the special circuit of the air conditioner at the rated voltage.
Do not place valuables under the air conditioner. Air conditioner condensation problems may damage the valuables.
When the air conditioner needs to be moved and re-installed, please entrust the local dealer or a professional technician to operate it.

8

Operation

Disposal: Do not dispose of this product as unsorted municipal waste. Collection of such waste separately for special treatment is necessary. Do not dispose of electrical appliances as unsorted municipal waste, use separate collection facilities. Contact your local government for information regarding the collection systems available. If electrical appliances are disposed of in landfills or dumps, hazardous substances can leak into the groundwater and get into the food chain, damaging your health and well-being.

Caution
To use the unit normally, please follow the “Operation” section in this manual. Otherwise, the internal protection may be triggered, the unit may begin to drip, or the unit’s cooling and heating effects may be impacted.
The room temperature should be set properly, especially when there are elderly, children, or patients in the room.
Lightning or the starting and stopping of large electrical equipment in nearby factories may cause misoperation of the air conditioner. Please turn off the main power switch for a few seconds, and then restart the air conditioner.
To avoid accidental resetting of the thermal circuit breaker, the air conditioner cannot be powered by an external switching device such as a timer or connected to a circuit that is turned on and off by a common component timer.
Check whether the air filter is installed properly. Confirm that the inlet and outlet ports of the indoor unit/outdoor unit are not blocked.
If the air conditioner will not be used for a long time, please clean the air filter before you start the air conditioner. Otherwise, dust and mold on the filter could contaminate the air or produce an unpleasant odor. For more details, please refer to the section “Maintenance and Service”.

USE

2 Optimum Operation

As cold air sinks and hot air rises, to improve the cooling and heating effect, it is recommended to have an angle of 25° to 80° between the louver and ceiling during cooling and heating.

9

Operation

Caution
Long-term air output at a 30° angle may cause condensation on the surface of the louver. It is recommended to turn on the anti-condensation function through the wired controller to alleviate this situation.

Operating Range

Use the unit in the following temperature and humidity ranges for safe and effective operation.

Cooling Heating

Indoor temperature
Indoor humidity
Indoor temperature

16~32°C
80% (When the humidity exceeds 80%, long-time operation of the indoor unit may cause dew condensation on the surface of the indoor unit, generate mist-like cold air from the air outlet or water dripping out of the unit.)
15~30°C

Caution
If it exceeds this operating range, safety devices may be put in action and the unit may not operate.

3 Symptoms That Are Not Faults

Normal Protection of the Air Conditioner During operation, the following phenomena are normal and do not require maintenance.

Protection

When the power switch is on, the air conditioner starts 3-5 minutes after it is turned ON again in case it was turned off just before.

Anti-cold air
protection
(Heat pump type)

In heating mode (including heating in automatic mode), when the indoor heat exchanger does not reach a certain temperature, the indoor fan temporarily shuts off, or runs in Low mode until the heat exchanger heats up to prevent the blowing of cold air.

Defrosting
(Heat pump type)

When the outdoor temperature is low and the humidity is high, the outdoor unit’s heat exchanger may become frosted, which may reduce the heating capacity of the air conditioner. If this occurs, the air conditioner will stop heating, enter automatic defrosting mode, and return to heating mode after defrosting has been completed. During the defrosting, the outdoor fan stops running and the indoor fan runs using the anti-cold air protection function. The defrosting operation time varies depending on the outdoor temperature and the degree of frosting. It generally takes 2 to 10 minutes. During the defrosting process, the outdoor unit may emit steam due to the rapid defrosting, which is normal.

10 Operation

The following symptoms are not system malfunctions
The following phenomena are normal during operation of the air conditioner. They can be solved according to the instructions below or do not need to be solved.
The indoor unit emits white mist When humidity is high during cooling mode, white mist may appear due to the humidity and the temperature difference between the air inlet and outlet. When the air conditioner is switched to heating mode after defrosting, the indoor unit discharges the moisture generated from defrosting as steam.
The indoor unit blows dust When filter is very dirty, dust may enter the indoor unit and be blown out.
The indoor unit emits odor The indoor unit absorbs the odors of rooms, furniture or cigarettes, etc., and disperses the odors during operation. It is advised to have the air conditioner cleaned and maintained regularly by professional technicians.
Water drips When the indoor humidity is high, condensation and water may drip out of the unit.
“Self-cleaning” sound of icing During self-cleaning, there may be a slight clicking sound from the melting thin ice about 10 minutes.
Noise of Indoor unit A continuous low “hissing” sound is heard when the system is in “Auto”, “Cool”, “Dry”, and “Heat” modes. This is the sound of refrigerant gas flowing through both indoor and outdoor units. A “hissing” sound is heard at the start or immediately after stopping operation or defrost operation. This is the noise of refrigerant caused by flow change. A “zeen” sound is heard immediately after the power supply is turned on. The electronic expansion valve inside an indoor unit starts working and makes the noise. it will reduce in about one minute. A continuous low “shah” sound is heard when the system is in cooling mode, dry mode or at a stop. When the drain pump (optional accessories) is in operation, this noise is heard. A “pishi-pishi” squeaking sound is heard when the system stops after heating operation. Expansion and contraction of plastic parts caused by temperature change make this noise. A low “sah”, “choro-choro” sound is heard while the indoor unit is stopped. When another indoor unit is in operation, this noise is heard. In order to prevent oil and refrigerant from remaining in the system, a small amount of refrigerant is kept flowing.
Switching from cooling/heating (not available for cooling only units) mode to fan only mode When the indoor unit reaches the set temperature, the air conditioner controller automatically stops the compressor operation and switches to the fan only mode. When the room temperature rises (in cooling mode) or falls (in heating mode) to a certain level, the compressor is restarted and cooling or heating operation is resumed.
11 Operation

In winter, the outdoor temperature is low, and heating effects may be decreased In heating mode, the air-conditioning system absorbs heat from the outdoor air and releases heat to the indoor side. When the outdoor temperature is low, less heat is released. This is the principle of heat pump. When the outdoor temperature is extremely low, the heating capacity of the air conditioner decreases, and other heating equipment may need to be added.
Mode conflict All indoor units in the same refrigerant system can only operate in the same mode, such as cooling, heating or other modes. Setting to a different mode will make conflict and the system will stop. Make sure all indoor units are running in the same mode.
No heating or cooling options For the same air conditioning system, if outdoor unit operates in changeover mode, the main wired controller allows users to select modes supported by the indoor units, while the wired controller of a non-master indoor unit displays the icon of ” No permission “. In this case, theNo permission mode setting is unavailable, and other indoor units operate in the same mode as the master indoor unit.
12 Operation

4 Display Panel (Optional)

Not all models can display keys and LED indicators.

Digital display area: display information such as temperature, error code, and spot check information.

Display functions:

1. In Standby mode, the main interface displays “—“.

2. When starting up in Cool or Heat mode, the main interface displays the set temperature. In Fan mode, the main interface displays the indoor temperature. In Dry mode, the main interface displays the set temperature, and when the humidity* is set, the set humidity value is displayed on the wired controller.

3. When the auxiliary heater is powered on, the icon ” ” on the main interface lights up.

4. The LED indicators on the main display can be turned on or off through the indicator keys on the remote controller.

5. When the system fails or runs in a special mode, the main interface displays the error code or the special mode running code. For details, “Error Codes and definitions”.

Note
Humidity* : The humidity control functions is customized. Some display functions are available only for certain indoor unit and outdoor unit models, wired controllers, and display boxes. For more information, please consult your local dealer or technical support.

5 Disposal
Components and accessories from the units are not part of ordinary domestic waste. Complete units , compressors, motors etc. are only to be disposed of via qualified disposal specialists. This unit uses hydrofluorocarbon which is only be disposed of via qualified disposal specialists.

13 Operation

Installation

Carefully read this manual before installing the indoor unit.

1 Installation Precautions

Qualification and Safety Regulation Requirements

Warning
Please carry out the installation according to local standards.
Ask your local dealer or professionals to install the product. This unit must be installed by professional technicians with relevant specialized knowledge. Users MAY NOT install the unit themselves; otherwise, faulty operations may cause the risks of fire, electrical shock, injury, or leakage, which could harm you or others or damage the air conditioner.
Never modify or repair the unit on your own. Otherwise, a fire, electric shock, injury or water leakage may occur. Get your local dealer or a professional to do so.
Ensure that the residual current device is installed. The residual current device must be installed. Failure to install it may result in electric shock.
When powering the unit, follow the regulations of the local electric company. Make sure that the unit is grounded reliably in accordance with laws. If the grounding is not completed correctly, it may cause electrical shock.
When moving, disassembling or reinstalling the air conditioner, get the assistance of your local dealer or a professional. If installed improperly, fire, electrical shock, injury, or water leakage may occur.
Use the optional accessories specified by local dealer. The installation of these accessories must be carried out by professionals. Improper installation may cause fire, electrical shock, water leakage and other hazards.
Use only power cables and communication cables that meet specification requirements. Properly connect all the wiring to make sure that no external forces are acting on the terminal blocks, power cables and communication cables. Improper wiring or installation may cause a fire.
The air conditioner must be grounded. Check whether the earth line is securely connected or broken. Do not connect the ground line to gas cans, water piping, lightning rods or telephone earth lines.
The main power switch of the air conditioner should be put in a position that is out of the reach of children. It should not be obstructed by flammable objects such as curtains.
Open flames are prohibited when refrigerant leaks are present. If the air conditioner is not cooling/heating properly, this may be caused by a refrigerant leak. If this occurs, contact your local dealer or a professional. The refrigerant in the air conditioner is safe, and usually does not leak. If there is refrigerant leakage in the room, it is easy for a fire to occur after contact with the heating units of the heater/electric stove/stove. Please disconnect the power supply of the air conditioner, extinguish the flames of appliances that produce a flame, and open the windows and doors of the room to allow ventilation and ensure that the concentration of refrigerant leakage in the room does not exceed a critical level; keep away from the leakage point, and contact the dealer or professional personnel.
After the refrigerant leakage is repaired, do not start the product until the maintenance personnel confirms that the leakage is well repaired.
14 Installation

Designated products

Before and after installation, exposing the unit to water or moisture will cause electrical short circuit. Do not store the unit in a humid basement or expose it to rain or water.
Make sure the installation base and lifting are robust and reliable; Insecure installation of the base may cause the air conditioner to fall, leading to an accident. Take into full consideration the effects of strong winds, typhoons and earthquakes, and reinforce the installation.
Check whether the drain pipe can drain the water smoothly. Improper installation of the pipeline may lead to water leakage, damaging furniture, electric appliances, and the carpet.
After installation, check whether the refrigerant is leaking.
Do not install the product in a location where there is a danger of flammable gas leaks. In the event of leakage of combustible gas, the combustible gas surrounding the indoor unit may cause a fire.
Install an air filter of 30-80 mesh/inch at the return air grille to filter dust in the air and keep the air diffuser clean and free from dirt blockage.

indoor unit
GAS

Caution
Keep the indoor unit, outdoor unit, power cable, and connecting wires at least 1m away from the high-power radio equipment, to prevent electromagnetic interference and noise. For some electromagnetic waves, it is not enough to prevent noise even at a distance of more than 1m.
In a room equipped with fluorescent lamps (rectifier type or fast start type), the signal transmission distance of the remote controller (wireless) may not reach the predetermined value. Install the indoor unit as far away from the fluorescent lamp as possible.
Do not touch the fins of the heat exchanger, as this could cause injury.
For safety, please dispose of the packing materials properly. Nails and other packaging materials may cause personal injury or other risks. Tear up the plastic packaging bag and dispose of it properly to prevent children from playing with it, leading to suffocation.
Do not cut off the power supply immediately after the indoor unit stops running. Some parts of the indoor unit like the valve body and water pump are still in operation. Please wait for at least 5 minutes before cutting off the power supply. Otherwise, water leakage and other faults may occur.
If the length and direction of the air inlet/outlet panel or connecting duct have been changed, complete the following settings on the controller before use the air conditioner again: (For details, see the Application Control section) Reset the initial static pressure on the controller or perform a trial run on the outdoor unit (performed by the installer), and set the current state as a reference state for the unit to determine the filter status.
If the above operations are not performed, then the unit may not detect the state of the filter accurately.
For evaporating units and condensing units, the instructions or markings shall include a wording to assure that the maximum operating pressure is considered when connecting to any condenser unit or evaporator unit.
For evaporating units, condensing units and condenser units, the instructions or markings shall include refrigerant charging instructions.
A warning to assure that partial units shall only be connected to an appliance suitable for the same refrigerant.
This unit is a partial unit air conditioner, complying with partial unit requirements of this International Standard, and must only be connected to other units that have been confirmed as complying to corresponding partial unit requirements of this International Standard.
The electrical interfaces shall be specified with purpose, voltage, current, and safety class of construction.
The SELV connection points, if provided, are to be clearly indicated in the instructions.
The connection point should be marked with the “read the instructions” symbol per ISO 7000-0790 (2004-01) and the Class III symbol according to IEC 60417-5180 (2003-02).
For R32 Refrigerant only. This unit is equipped with a refrigerant leak detector for safety. To be effective, the unit must be electrically powered at all times after installation, other than when servicing.
If any supplemental unit is employed to detect leaked refrigerant, such unit shall also apply this marking or be accompanied by such instructions.
15 Installation

Precautions for Carrying and Lifting the Air Conditioner
1 Before carrying the air conditioner, determine the route that will be used to move it to the installation site.
2 Do not unseal the air conditioner until it is moved to the installation site.
When unpacking and moving the air conditioner, must hold the hanger seat and do not apply force to other parts,
3 especially the refrigerant piping, drain pipe and plastic accessories, so as to avoid damaging the air conditioner
and causing personal injury. Before installing the air conditioner, make sure that the refrigerant specified on the nameplate is being used. For
4 the installation of the outdoor unit, refer to the installation instructions in the Installation and Operation Manual
attached with the outdoor unit.
Forbidden Installation Sites
Warning
Do not install or use the air conditioner in the following places: A place filled with mineral oil, fumes or mist, like a kitchen. Plastic parts will age and the heat exchanger will become dirty, eventually causing the air conditioner performance to deteriorate or leak water. A place where there are corrosive gases, such as acid or alkaline gases. Connecting pipes and copper welds will be corroded, resulting in refrigerant leakage. A place exposed to combustible gases and using volatile combustible gases such as diluent or gasoline. The electronics in the air conditioner may cause the surrounding gas to ignite. A place where there is equipment emitting electromagnetic radiation. The control system will fail and the air conditioner will not function properly. A place where there is a high salt content in the air like a coastal area.
Do not use the air conditioner in an environment where an explosion may occur.
The unit cannot be installed on moving vehicles such as truck and ship.
Factories with major voltage fluctuations in the power supplies.
Other special environmental conditions.
Caution
Air conditioner units of this series are designed to provide comfort. Do not use them in equipment rooms and rooms with precision instruments, food, plants, animals, or works of art.
Recommended Installation Sites
It is recommended to install the air conditioner according to the design drawing of the HVAC engineer. The selection principle for the installation site is as follows:
Ensure that the airflow in and out of the indoor unit is reasonably organized to form an air circulation in the room.
Ensure indoor unit maintenance space.
Prevent the air conditioner from blowing directly at the human body.
16 Installation

Keep the air-conditioning return air away from direct exposure to the sun in the room. The indoor unit should not be lifted in the places like load-bearing beams and columns that affect the structural safety of the house. The wired controller and the indoor unit should be in the same installation space; otherwise, the sampling point setting of the wired controller needs to be changed.
Choose a site that fully complies with the following conditions and user requirements to install the air conditioning unit:
There is enough space for installation and maintenance. The ceiling is level, and the structure is strong enough to support the indoor unit. If necessary, take measures to reinforce the unit’s stability. Airflow in/out of the machine is not obstructed, and the external air exerts minimum impact. It is easy to supply airflow to every corner of the room. It is easy to drain fluids from the connected piping and water drain piping. There is no direct heat radiation. Avoid installation in narrow spaces or where there are more stringent noise requirements. The indoor unit needs to be installed at a position greater than 2.5m and less than 3.5m from the ground. Condensate water can be discharged smoothly. The length of the piping between the indoor and outdoor units is within the permitted range. Refer to the Installation and Operation Manual attached with the outdoor unit.

2500 mm

Ceiling
Floor
Capacity(kW) kW3.6
3.6<kW7.1 Louver
Air outlet

Panel
A(mm) 153 189
Return air inlet
17 Installation

Layout
Installation layout
1

4

56 7

89

2

3

12

11

14

10

13 15

1 IDU

2 Panel (optional)

4 Water pump

5 Drainage outlet for water pump

7 Motor

8 Gas pipe

10 Access hole

11 *Power cable and earth wires

13 *Connection wires

14 Wired controller (optional)

• To be purchased separately on site.

3 Fresh air inlet 6 Water cover assembly 9 Liquid pipe 12 *Communication line 15 Remote controller (optional)

Note
All the optional accessories should be from local dealer. For optional accessories such as wired controllers, please refer to the manuals of these accessories. All the figures in the manual explain only the general appearance and functions of the product. The appearance and functions of the purchased product may not be completely consistent with those listed in the figures. Please refer to the actual product.
18 Installation

Product Dimensions

(Unit: mm)

G

lifting bolts

C: Distance between

B: Dimensions of unit

A: Panel dimensions

H I J

KL
M N

D: Distance between lifting bolts E: Dimensions of unit F: Panel dimensions

Hanger rod installation

52 150

Main body of air conditioner

Panel

Ceiling

OD of water-outlet pipe connector (25) O: Refrigerant piping connector (liquid side) P: Refrigerant piping connector (gas side)
Hex nut (to adjust the level)

Capacity(kW) kW3.6
3.6<kW5.6 5.6<kW7.1

A

B

C

D

E

F

G

H

465 428 290 1004 1054 1180 153 238

505 452 300 1225 1275 1350 189 236

505 452 300 1225 1275 1350 189 236

I

J

K

188 139 34

180 147 68

180 147 68

Capacity(kW) kW3.6
3.6<kW5.6 5.6<kW7.1

L

M

N

O

P

70 102 141 6.35 12.7

70 139 176 6.35 12.7

70 139 176 9.52 15.9

19 Installation

2 Installation Materials

Accessories

List of accessories

Installation and Operation Manual X 1
IDU installation instructions (Make sure to hand it over to the user)

Flare nut X 2
For use in the installation of connecting pipe (the quantity is one for models with a process pipe)

Drain pipe X 1
Unavailable for units with a drain pump

Cable tie X 10
Used to tighten the drain hose tightly to the drainage outlet and PVC piping of the indoor unit

Thermal insulation pipe X 2
Used for insulation and anti-condensation at pipe connections

Mounting cardboard X1
Used to install the hanger rod and cut the drop ceiling

Installation screw for panel X 7
Used to install the panel on the air conditioner (6 pieces for models 18-36, 7 pieces for models 45-71)

Nut X 8
Used to secure the suspended air conditioner

Large washer X 8
Used to secure the suspended air conditioner

Ring clamp for water drain pipe X 1
Used to secure the water drain hose

Note
When installing the insulation pipe on site, please cut it according to the actual needs. (Either method (a) or (b) is OK. Method (c) is incorrect. There must be no gap between the insulation pipe and connecting pipe.)

Not connected

(a)

(b)

(c)

Clearance

Check the accessory kit for the above items and contact your local dealer if any items are missing. Do not throw away any accessories that may be required for installation until the installation is complete.
Customers are free to choose to buy wired controllers, display box, remote controllers (with a seven-speed wind controller) and other optional accessories.

Locally Purchased Accessories

List of accessories

Connecting pipe

PVC water drain pipe

Used to connect the indoor Used to drain the

unit refrigerant system.

condensed water from the

indoor unit

Thermal insulation pipe
Used to prevent pipe condensation

Expansion screw (M10) X4
Used to install the indoor unit

Lifting bolt (M10) X4
Used to install the indoor unit

20 Installation

Capacity(kW) kW5.6
5.6<kW7.1

Piping

Connecting pipe (Unit: mm) Liquid side 6.35×0.75 9.52×0.75

Gas side 12.7×0.75 15.9×1.0

Remarks

For connection of the indoor unit refrigerant system, it is recommended to use a soft connecting pipe (T2M), with the length selected according to the actual situation.

PVC water drain pipe
This is used as the indoor unit’s drain pipe, 25mm in diameter. The length is determined according to actual needs.

Thermal insulation pipe
The thickness of the insulation pipe for the connecting pipe is usually 15mm or above; and the thickness of the insulation pipe for the rigid polyethylene plastic tube is usually 15mm or above. If the pipe is used in a closed humid area, the thickness should be increased.

Note
The materials necessary for onsite installation of the connecting pipe, water drain pipe, lifting screw, air supply and return grille, various fasteners (pipeline bracket, Victaulic connector, screw, etc.), power cable, signal line, etc. need to be purchased by the installer on site. The materials and specifications must comply with the corresponding local or industrial standards.

Heat Insulation Material Requirements

Connecting pipe
insulation

The insulation work should only be carriedout after the successful completion of the air tight test. Use polyethylene foam as insulationmaterial, fire rating class is B1 and heat resistance is over 120°C. Thickness of the insulation pipe: 1. When the pipe diameter is equal to orgreater than 15.9mm, the insulation thickness is at least 20mm. 2. When the pipe diameter is equal to orsmaller than 12.7mm, the insulation thickness is at least 15mm. In cold climates, for heating application,the insulation thickness of outdoor refrigerant pipe is at least 40mm, theinsulation thickness of indoor refrigerant pipe is at least 20mm. Use glue to seal the jointed areas of thermalinsulation pipes, and then wrap them with electrical tape with a width of notless than 50mm to ensure the connection is sealed. Make sure the insulation between therefrigerant pipes and the Indoor unit are entire to prevent the condensation.

Drain pipe insulation

After the drainage test shows that thereare no leaks, carry out the insulation of the drain piping. Drain pipe connection hole shall beinsulated to prevent condensation. Drain piping passing indoors shall beinsulated to prevent condensation, and insulation sleeves should be thickerthan 10mm. Use glue to seal the jointed areas ofthermal insulation pipes. The head of the metal clamp should be atthe top, and metal clamp should be well insulated.

Note
The materials and specifications of insulation materials must meet national or industry standards.

21 Installation

3 Preparations Before Installation

Unpacking Check
Before installation, check whether the packing materials are in good condition, whether the accessories that come with the product are complete, whether the air conditioner is intact, whether the surfaces of the heat exchanger and other parts have become worn, and whether there are oil stains on the stop valve of the unit.
Check the two sealing nuts of the refrigerant pipe, and observe whether the red dot on the surface of the sealing nut of the gas pipe bulges. If it bulges, the pipe is well sealed; if it retracts, the line is leaking, and need to contact local dealer.
Check the machine model before installation.
After indoor unit and outdoor unit inspection, pack them with plastic bags to avoid intake of foreign matters.

The red dot bulges
Sealing
The red dot retracts
Air leakage

Indoor Unit Positioning
Determine the positions of the air conditioning unit and lifting screws Determine the air outlet/return mode and the lifting position of the indoor unit according to the design drawing. Draw lines to locate the drilling positions of the bolts according to the three-dimensional diagram of the unit. There should be no obstacles within 200 mm of the return air inlet. It is suggested to use an infrared ray locator for line drawing.

Top view

Wall

(Unit: mm)

22 Installation

Side view A

C

Note
The air conditioner should be mounted at a height within the required range. Otherwise, it will not perform as expected.

Air outlet

E
Return air inlet

Caution
No obstacles (chandelier etc.) in front of the air outlet. Select a proper air supply angle range.

Capacity(kW)

A

B

C

kW3.6

1180

1380

153

3.6<kW7.1

1350

1550

189

23 Installation

D 3200 4000

(Unit: mm) E 465 505

Determine the positions of the ceiling opening, the unit and the lifting bolts

1 Make an opening according to the profile of the mounting cardboard.

(Unit: mm)

Bolt positioning dimension: B

Size of opening in ceiling: A

Capacity(kW) kW3.6
3.6<kW7.1

Bolt positioning dimension: D Size of opening in ceiling: C

A

B

C

D

430

290

1100

1015

470

300

1290

1235

Air conditioner

The distance between the end of the lifting bolt and the lower surface of the ceiling should be 30 to 40 mm

A

Ceiling

Capacity(kW)

A

kW3.6

70

3.6<kW7.1

75

Caution
A total of four lifting bolts are required to install the air conditioner. See the above for the dimensions of the bolts. You can use the mounting cardboard to determine the positions of the bolts during installation.
Requirements for lifting bolt length:
Design the length of the lifting bolts according to the requirements in the above figure. If the length is incorrect, the air conditioner and its panel cannot be installed correctly.

2 Use the mounting cardboard to determine the positions of mounting holes.

24 Installation

3 When installing the air conditioner on a new ceiling, affix a piece of cardboard to the main
body of the installed air conditioner for reference to determine the size, location, and center of the ceiling opening. Caution
Evenly adjust the four hex nuts to make sure that the body of the air conditioner is level. When the air conditioner is to be fixed onto the ceiling with a frame: The horizontal distance of the overlapping part of the ceiling and decoration panel must be more than 10mm. The distance between the indoor unit and the ceiling must be within 12mm. If the distance is greater than 15mm, retrofit the ceiling.
If necessary, cut out an opening for installation on the ceiling (where there is an existing ceiling)
The dimensions of the ceiling opening should be based on the opening of the mounting cardboard. Fold six mounting lugs.
Caution
Fold the lugs in such a manner that the side with nothing printed on it protrudes. Otherwise, the mounting cardboards cannot be installed. Install the mounting cardboard by using the installation screws for the panel.
Caution
Seven screws are included in the accessory package to models with a power of 3.6<kW7.1. Only six screws are required for the mounting cardboard. Please retain the extra screw in case you need it at a later time.
25 Installation

Cut the ceiling and verify that the lifting height is correct.
24 mm
Caution
After the ceiling is cut, remove the mounting cardboard. Keep the screws as you will need them for installing the panel.
Caution
Before connecting the indoor unit piping and wiring, connect the refrigerant piping, drainage pipe, remote controller wire (not required when a wireless remote controller is used), and the connection wire, power cable, and ground wire between the indoor unit and iutdoor unit (please refer to piping and wiring instructions) so that they can be connected to the indoor unit immediately after installation. To cut ceiling holes, the ceiling bracket may be reinforced to keep the ceiling flat and prevent the ceiling from vibrating. For details, please consult the builder.
26 Installation

4 Indoor Unit Installation
Warning
Install the air conditioner in a location with sufficient strength to support the weight of the unit. Take reinforcement measures when necessary. The unit may fall and cause personal injury if the location is not strong enough. Unstable installation may cause the unit to fall and cause an accident. Before wiring/pipe layout, make sure that the installation area (walls and floor) is safe and free of water, power, gas, and other hidden dangers.
Installation of lifting bolts
Based on the distance between the four hanging holes of the indoor unit, use a pencil to draw the positions of screws to be fixed on the ceiling. After holes are drilled, tighten the expansion screws into the holes (by welding a fully threaded bolt of 490mm onto an expansion screw of 8mm, with two screw caps), and then place the four corners of the indoor unit in the bolt to lift the unit.
Use four hanger rods during lifting. The diameter of the lifting bolt shall not be less than 12mm. The hanger rods are strong enough to support two times the weight of the indoor unit, with two nuts tightened below the hanger rods.
When the length of the hanger rod exceeds 1.5m, two diagonal braces must be added to provide stability. Removing the ceiling: Since building structures differ, discuss building details with the interior decoration
workers.
a. Ceiling treatment: Reinforce the ceiling pedestal to make sure that the ceiling is level and to prevent ceiling vibrations.
b. Cut off and dismantle the ceiling pedestal. c. Reinforce the remaining surface after the ceiling is removed. Add further reinforcements to the pedestal on
two ends of the ceiling. d. Once the main unit has been lifted and mounted, carry out the piping and wiring tasks within the ceiling.
Determine the outlet direction of the piping after the installation site has been finalized.
For sites where the ceiling is already available, first connect and put in position the refrigerant piping, water drain piping, and connecting wires of the indoor unit and wired controller before hoist and mount the unit.
Caution
High-quality carbon steel bolts (galvanized or with other anti-rust paint applied) or stainless steel bolts are used. How the ceiling is treated will differ with the type of building. For specific measures, please consult the building and renovation engineers. How the lifting bolt is secured varies according to the specific situation, and it must be secure and reliable.
27 Installation

Installation of Lifting Bolts

Refer to the following figure on installation using the lifting bolts.

Sites with concrete slabs Use embedded bolts and pull bolts

Sites with concrete slabs
Directly set and use an angle iron for support. Lifting bolts

Lifting bolts

Angle iron for support

Indoor Unit Installation

Caution
The indoor unit must not be too close to the ceiling. It shall be installed level or at an angle within 1° towards the drainage side. (For units without a drain pump, ensure a slope of 1/100 towards the drainage side. Do not tilt towards the non-drainage side.) Otherwise, water cannot drain smoothly and leaks can easily occur.
Keep the indoor unit free from dust or foreign particles. Use the plastic bags provided with the product to cover the unit.

1

Adjust the positions of the upper nuts to keep a proper gap between the lifting lug (bottom) and the ceiling.

70 mm for models kW3.6; 75 mm for models 3.6<kW7.1

2

Hook the nut of the lifting bolt into the U-shaped groove of the lifting lugs. Secure the top and bottom of the lugs with washers and nuts.

Lifting bolt
Nut (top) Washer (top) Lifting lugs

Tighten the upper and lower nuts

Washer (bottom) Nut (bottom)

28 Installation

3

Keep the unit level. Use a transparent hose to observe the water level (principle of communicating vessels) and verify the levelness of the unit in the depth direction.

Use a transparent hose to observe water level (principle of communicating vessels) and verify the tilt angle of the unit in the length direction. It shall be installed level or at an angle within 1° towards the
4 drainage side. (For units without a drain pump, ensure a slope of 1/100 towards the drainage side. Do
not tilt towards the non-drainage side.) Otherwise, water cannot drain smoothly and leaks can easily occur.

Drain side

Tilt by 1/100

Panel Installation

Caution
Prior to installation of the panel parts, verify that the refrigerant piping and the drainage system are installed properly and fitted with insulation and wiring. Verify that the air conditioner is install flatly and at a proper height. Verify that the ceiling opening size is proper according to the mounting cardboard attached to the air conditioner and this manual.

1 Remove the return air grille, filter screen, and cover plates for concealing screws.

1

Pull the buckle along the direction indicated by the arrow on the grille switch to unlock the buckle and remove the return air grille.

29 Installation

2 Toggle the buckle shown in the figure to remove the filter screen.
Open the fan guide vane and remove the three cover plates for concealing screws.
3 Keep the removed air grille, filter screen, and cover plates for concealing screws probably. Be careful
not to lose them and protect them from dirt and scratches. Open the fan guide vane and remove the three cover plates for concealing screws shown in the figure. Keep the removed return air grille, filter screen, and cover plates for concealing screws.

2 Install panel parts and connect wires

1

Two buckles are designed on the panel assembly to assist in the installation of the panel. Install the buckles as shown in the figure.

Slot in later

Slot in first
30 Installation

Electrical wiring of panel assembly: Open the electric control box cover of the air conditioner, and connect
2 the control display connection terminal of the panel assembly and the motor connection terminal of the
fan guide vane to the main control board of the air conditioner, as shown in the figure.

Lead the 4-core cable on the panel through the cable hole to the electric control box

Connect the 4-core cable plug on the panel to CN30 on the main control board
Capacity kW3.6

Lead the two cables on the panel through the cable hole to the electric control box
Connect the 4-core cable plug on the panel to CN30 on the main control board Capacity 3.6<kW7.1
Warning
Strictly follow what is indicated in the diagram. Incorrect wiring may cause panel parts malfunction. Connect the cables according to what is indicated in the installation diagram. If the wiring is incorrect, the cover of the electric control box cannot be closed correctly. may lead to problems like air leakage, water condensation, and bulges on the panel assembly.
31 Installation

3 Install screws
One more screw is required for capacity 3.6<kW7.1.
M4×22 screws (6 for capacity kW3.6; 7 for capacity 3.6<kW7.1), included in the accessory package
Warning
Make sure the cables connected to the panel and air conditioner are not clamped before you install the screws. If any cable is clamped, the cable can be damaged when you tighten the screws, and the panel may not be flat after installation.
4 Install the cover plates for hiding screws.
Cover plate for concealing screws
32 Installation

5 Install the filter screen and return air grille.
Caution
The panel should be installed in such a manner that its display faces towards the piping side of the air conditioner. After confirming that everything is correct, tighten the installation screws for the panel.
5 Refrigerant Connecting Piping Installation
When connect different series of outdoor units, the length and level differences of piping connections. Refer to the Installation and Operation Manual attached with the outdoor unit.
Caution
During the installation of the connecting pipes, do not allow air, dust, and other debris to penetrate the piping system, and make sure the interior of the pipes is dry. Install the connecting pipes only when the indoor units and outdoor units are secured. When installing the connecting pipes, record the actual installation length of the liquid pipe on the spot so that additional refrigerant can be added. The connecting pipes must be wrapped with thermal insulation materials when they are installed. In the event of refrigerant gas leakage during operation, please ventilate immediately.
Pipe Layout
Bend the pipes or punch holes in the wall as needed. The deformed pipe area must not exceed 15% of the total area. A protective casing should be installed at the wall or floor hole. The weld joint must
1 not be inside the casing. The drill hole on the external wall must be sealed and tightly wrapped with a
binding tie to prevent impurities from entering the pipe. The pipe must be insulated with the correctlysized insulation pipe.
33 Installation

Pipe insulation Pipe bending

D1 D1 D2 85%
D2

2

The wrapped connecting pipe is plugged through the wall hole sleeve from the outdoor side and enters the indoor side. The pipes must be arranged carefully so as not to damage the piping.

Outdoors

Indoors

Recommended through-wall direction

Pipe Connection Steps

Measure the required length of the connecting pipe. Make the connecting pipe using the following method (see “Pipe Connection” for details).

Connect the indoor unit first, then connect the outdoor unit.
Before tightening the flare nut, apply refrigeration oil on the inner and outer surface of the pipe flare (must use refrigeration
1 oil compatible with the refrigerant for this model), and turn it
3 or 4 turns by hand to tighten it.

Flare nut

Apply refrigerant oil to the inner and outer surface of the pipe socket.

When connecting or removing a pipe, use two wrenches at the same time.

Caution
Bend and arrange pipes carefully without damaging the pipes and their insulating layers.

Do not let the interface of the indoor unit bear the weight of the connecting pipe; otherwise, the connecting pipe may be crushed and deformed, which will affect the cooling (heating) effect, or the thermal insulation materials may be compressed, resulting in air leakage and condensation.

2

The connecting pipes to the outdoor units. Please refer the Installation and Operation Manual of the outdoor units.

Pipe Connection

Processing method Mechanical bending processing: Wider application (6.35mm­ 28mm), using spring pipe bender, manual pipe bender or electric pipe bender.
34 Installation

Caution
The bending angle should not exceed 90°; otherwise, wrinkles will be formed in the pipe, which can easily break.
The bending radius should not be smaller than 3.5D (pipe diameter) and should be as large as possible to prevent the pipe from becoming flattened or crushed. When mechanically bending the pipe, the pipe bender inserted into the connecting pipe must be cleaned.

1 Brazing pipes
When brazing pipes, fill the pipes with nitrogen.
Caution
When it is necessary to fill the piping with nitrogen during welding, the pressure must be kept at 0.02MPa using a pressure relief valve. Do not use flux when soldering the piping. Use a phosphor copper solder that does not require flux. Do not use any antioxidants when soldering the piping. The piping may become clogged with residual antioxidants, which may block components such as electronic expansion valves during operation.
Pressure reducing valve

Refrigerant Welding

piping

position

Nitrogen

Bandage

Manual valve

Nitrogen

2 Flaring
To cut the piping with a pipe cutter, rotate the pipe cutter repeatedly.
Put the pipe into the connecting nut flaring, and both the gas pipe and liquid pipe of the indoor unit are connected by flaring.

90°±4 45°±2
A
R0.4­0.8

Pipe cutter
Outer diameter (mm)
6.35 9.52 12.7 15.9 19.1

35 Installation

90° Slope Rough Burrs

A (mm)

Max.

Min.

8.7

8.3

12.4

12.0

15.8

15.4

19.1

18.6

23.3

22.9

Handle

“A”

Bar

Bar

Yoke

Cone

Connecting pipe Clamp handle

Red arrow mark

3 Nut fastening

1

Align the connecting piping, firstly tighten most of the thread of the connecting nut by hand, and then use a wrench to tighten the last 1-2 turns of the thread as shown in the figure.

2

The welding is done on site, and the bell mouth cannot be used indoors.(For IEC/EN 60335-2-40 except IEC 60335-2-40: 2018)

3

The protective nut is a one-time part, it can not be reused. In case it is removed, it should be replaced with a new one.(For IEC 60335-2-40: 2018 only)

Indoor unit pipe

Flare nut

Protective nut

Piping

Caution
Excessive torque can break nut on installation conditions. When flared joints are reused indoors,the flare part should be re-fabricated.

Pipe size (mm) 6.35 9.52 12.7 15.9 19.1

Tightening torque [ N.m (kgf.cm)] 14.2­17.2 (144­176) 32.7­39.9 (333­407) 49.5­60.3 (504­616) 61.8­75.4 (630­770)
97.2­118.6 (990­1210)

36 Installation

Caution
Depending on the installation conditions, excessive torque will damage the flared mouth, and too small torque cannot tighten the nut, which will cause refrigerant leakage. Please refer to the above table to determine the appropriate tightening torque.

Refrigerant Piping Fixing
Angle iron brackets or round steel hangers should be used for fixing. When the liquid pipe and gas pipe are suspended together, the size of the liquid pipe shall prevail.

Pipe outer diameter (mm)

20

20~40

40

Horizontal pipe distance (m)

1.0

1.5

2.0

Stand pipe distance (m)

1.5

2.0

2.5

Vacuum Pumping
Connect the vacuuming unit through a manifold to the service port of all stop valves.

Indoor unit

Outdoor unit

Stop valve

High pressure gauge Pump valve

Vacuum pump

Low pressure gauge

Caution
Do not purge the air with refrigerant of outdoor unit, it will cause the system malfunction.

37 Installation

Leak Detection
The leak test must satisfy the specifications of EN378-2.
1 To check for leaks: Vacuum leak test
Evacuate the system from the liquid and gas piping to ­100.7 kPa (­1.007 bar)(5 Torr absolute) for more than 2 hours.
Once reached, turn off the vacuum pump and check that the pressure does not rise for at least 1 minute. Should the pressure rise, the system may either contain moisture (see vacuum drying below) or have leaks.
2 To check for leaks: Pressure leak test
Test for leaks by applying a bubble test solution to all piping connections. Discharge all nitrogen gas. Break the vacuum by pressurising with nitrogen gas to a minimum gauge pressure of 0.2 MPa (2 bar). Never
set the gauge pressure higher than the maximum operation pressure of the unit, i.e. 4.0 MPa (40 bar).

Note
ALWAYS use a recommended bubble test solution from your wholesaler. NEVER use soap water: Soap water may cause cracking of components, such as flare nuts or stop valve caps. Soap water may contain salt, which absorbs moisture that will freeze when the piping gets cold. Soap water contains ammonia which may lead to corrosion of flared joints (between the brass flare nut and the copper flare).
Heat Insulation Treatment
Pipes on the liquid and air sides have a low temperature during cooling. Take sufficient insulation measures to prevent condensation.

Be sure to use a thermal insulation material with a heat resistance of 120°C or higher for the gas pipe.
The attached insulation material for the part of the indoor unit where the pipe connects must undergo heat insulation treatment that leaves no gaps.
For outdoor pipelines, additional protective treatments should be performed, such as adding metal duct boxes or wrapping the pipes with aluminum foil materials. Thermal insulation materials directly exposed to the open air will degrade and lose their insulating properties.

Unit Auxiliary heat body insulation pump belt

Onsite piping side

38 Installation

6 Drain Pipe Installation

Caution
Before installation of the condensate pipeline, determine its direction and elevation to avoid intersection with other pipelines to ensure that the slope is straight.
The highest point of the drain pipe should be equipped with a vent port to ensure the smooth drainage of condensate water, and the vent port must face downwards to prevent dirt from entering the pipe.
Do not connect the drain pipe to the wastewater pipe, sewage pipe, or other pipes that produce corrosive gases or odors. Otherwise, the indoor unit (especially the heat exchanger) may be corroded and odor may enter the room, negatively impacting the heat exchange effects and user experience. The user will assume responsibility for any consequences resulting from failure to abide by instructions.
After the pipeline connection is completed, a water test and a full water test should be done to check whether the drainage is smooth and whether the pipeline system leaks.
The air conditioner drain pipe must be installed separately from other sewage pipes, rainwater pipes and drain pipes in the building.
Adverse slope, convex and concave pipes are prohibited, as improper airflow will cause poor drainage. Drainage pipes need to be evenly wrapped with thermal insulation pipes to prevent condensation.
Please connect the drain pipes in the following ways. Improper installation of the pipes may result in water leakage and damage to furniture and property.
All joints of the drainage system must be sealed to prevent water leakage.

Installation of Water Drain Pipe for the indoor unit

Units without pumps: Use the attached drain hose to connect to the drain pan outlet and PVC pipe, and fasten the two ends of the drain hose with a cable tie. Then push the thermal insulation pipe to be closely attached to the main body, and finally fasten the end with a cable tie.

Units with pumps: Connect a PVC pipe to the water pump outlet, and fasten it with a cable tie. Then

1

push the thermal insulation pipe until it is closely attached to the main body, and finally fasten the end with a cable tie.

The connection between the two ends of the drain pipes and the connection of the water pump outlet need to be fastened with a cable tie, in combination with PVC/rubber adhesives. Pay attention to the instructions for the use of the adhesives to prevent corrosion to the EPDM rubber. Use hard PVC adhesives for connecting to other water piping. Check that the connections are tight with no leakage.

Indoor unit

Drainage outlet for water pump

90° Slope Rough Burrs Scratches

Orifice of the PVC water drain pipe should be flat and smooth

Cable tie

PVC drain pipe (outer diameter: 25mm) and insulation pipe (During on-site installation, the insulation pipe should be about 50mm longer than the PVC water drain pipe, so as to ensure that there is enough casing at the ends for insulation)
39 Installation

PVC water drain pipe (outer diameter: 25mm)

Thermal insulation pipe
Drainage outlet for water pump

The thermal insulation pipe is closely attached to the unit.

There is a large gap between the thermal insulation pipe and the unit, resulting in thermal insulation failure.

2

The water pump connecting pipe and drain pipe (in the indoor part) must be wrapped with heat insulation pipe evenly and bound with cable ties to prevent air from entering and producing condensate.

Cable tie

Drain pipe

Thermal insulation pipe

To prevent water from flowing back into the air conditioner when it stops running, the drain pipe should be inclined downward to the outdoor side (drainage side), with a downward slope of 1/100 or above.
3 The drain pipe should be positioned in the same direction as the drainage outlet of the unit in the left
and right direction, so that the drain pipe does not expand and collect water; otherwise, it may cause abnormal noise.
Direction

Slope of 1/100

Direction

Consistent with the direction of water discharge

When connecting the drain pipe, do not pull the drain pipe forcefully, or it may become loose. The lateral

4

length of the drain pipe should be within 20m, and a support point should be set every 0.8­1.0m to avoid air resistance caused by the deformation of the drain pipe. The drain pipe shall be equipped with

a support point every 1.5-2.0m.

Air outlet

Drainage pipe

0.8-1.0m

Within 20m

Slope of 1/100 or more

40 Installation

The end of the drain pipe must be more than 50mm above the ground or from the base of the water

5

drainage slot. In addition, do not submerge it in water. To drain the condensed water directly into a ditch, the water drain pipe must bend upwards to form a U-shaped water plug to stop odors from entering the

room via the water drain pipe.

Drain pipe

Ground

50mm

Method to drain water with the drain pump:

Air outlet

200

Slope > 1/100

800~1000

The net height of the drain pipe 1200

(Unit: mm)

How to connect the drain pipe for the drain pump of a single unit Air outlet

200

50~100

200

50~100
The net height of the drain pipe 1200

Water outlet connection pipe parts

Main water outlet pipe

Slope > 1/100

Drain pipes from drain pumps of multiple units are connected to the main drainage pipe to be discharged through the sewage pipe.

Hedging must be prevented for horizontal drain pipes to avoid adverse slopes and poor drainage.

Drain pipe

Drain pipe

Three-way Drain pipe drainage

Three-way drainage

Three-way drainage

41 Installation

Water Drainage Test

1 Before the test, make sure that the water drain piping is smooth, and check that
each connection is properly sealed.

2 Conduct the water drainage test in a new room before the ceiling is plastered.

The drain pipes for indoor units may use a PVC pipe
(outer diameter: 25mm). Larger pipe sizes shall be used
if a main pipe is connecting multiple units. Based on the
1 actual installation circumstances, users can purchase
pipes of appropriate specifications and lengths from a sales agent or the local after-sales service center, or
purchase them directly from the market.

Rotate in the direction of arrow to unlock the test water cap

Connect the power supply, and set the air conditioner to operate in cooling mode. Check the running sound of the
2 drain pump, and check whether the drainage outlet is draining normally (depending on the length of the drainage
pipe, it may be delayed for about one minute before draining), and whether there is water leakage at each joint.

If water drainage is carried out using the indoor unit drain pump, you need to remove the water cover assembly on

3

the unit when conducting the water drainage test, to check whether the drain pump has started. If the drain pump has not been started, check whether the drain pump is faulty. Note: The drain pump only starts in cooling mode

or dry mode. While in heating mode, the drain pump remains turned off.

Continue to add water until the alarm for excessive water levels is triggered. Check if the drain pump drains water

4

immediately. After three minutes, if the water level does not fall below the warning level, the unit will shut down. If this occurs, you need to turn off the power supply, and drain the accumulated water before you can turn on the

unit normally.

5 Turn off the power supply, remove the water, and put the water cover assembly back in its original place.

Caution
The drainage plug at the bottom of the indoor unit is used to remove the accumulated water in the drain pan when the air conditioner is faulty and being repaired. The drainage plug should be inserted during operation to prevent water leakage.
Faults, if any, need to be rectified as soon as possible.

42 Installation

7 Electrical Connection
Danger
The power supply must be cut off before any electrical work is carried out. Do not conduct electrical work when the power is on; otherwise, it may cause serious personal injury. The air conditioning unit must be grounded reliably and must meet the requirements of the local country/ region. If the grounding is not reliable, serious personal injury due to electric leakage may occur.
Warning
Installation, inspection or maintenance operations must be completed by professional technicians. All parts and materials must comply with the relevant regulations of the local country/region. The air conditioning unit must be equipped with a special power supply, and the power supply voltage should conform to the nominal working voltage range of the air conditioning unit. The power supply of the air conditioning unit must be equipped with a power disconnect device that conforms to the requirements of relevant local technical standards for electrical equipment. The power disconnecting device must be equipped with short circuit protection, overload protection and electric leakage protection. The clearance between open contacts of the power disconnecting device shall be at least 3mm. The core of the power supply cable must be made of copper, and the wire diameter should meet the currentcarrying requirements. For details, refer to the “Power Supply Cable Diameter and Electric Leakage Protector Selection”. A wire diameter that is too small may cause the power supply cable to heat up, resulting in a fire. The power supply cable and the earth wires should be secured reliably to avoid stress on the terminals. Do not pull the power supply cable forcibly; otherwise, the wiring may become loosened or the terminal blocks may be damaged. Strong current wires such as power supply cables cannot be connected to weak current wires such as communication wiring; otherwise, the product may be seriously damaged. Do not bond and connect the power supply cable. Bonding and connecting the power supply cable may cause it to heat up, resulting in a fire.
Caution
Avoid bonding and connecting the communication wring. If doing so is unavoidable, at the very least, ensure a reliable connection by crimping or soldering and make sure the copper wire at the connection is not exposed; otherwise, communication failure may occur. The power supply cable and communication wring must be routed separately, with a distance of over 5 cm. Otherwise, communication failure may occur. Keep the vicinity of the air conditioning unit as clean as possible to avoid small animals from nesting and biting the cables. If a small animal touches or bites the cables, short circuiting or electric leakage may occur. Do not connect the earth wires to the gas pipe, water pipe, lightning rod earth wires or telephone earth wires. Gas pipe: Risk of explosion and fire when gas leaks. Water pipe: If rigid plastic pipes are used, there will be no grounding effect. Lightning rod earth wires or telephone earth wires: In the event of lightning strikes, abnormal ground potential may rise. After all wiring is completed, check carefully before turning on the power supply.
43 Installation

Electrical Characteristics

Capacity (kW)

Electric specifications of the indoor unit

Frequency (Hz)

Voltage (V)

Voltage (V)

MCA (A)

MFA (A)

IFM power input (W)

FLA (A)

2.2

0.38

20

0.30

3.6

50

220

198~242

0.39

15

20

0.31

7.1

0.59

50

0.47

Notes:
MCA: Min. Circuit Amps. (A), which is used to select the minimum circuit size to ensure safe operation over a long period of time.
MFA: Max. Fuse Amps. (A), which is used to select the circuit breaker.
IFM power input: full load power input of the indoor fan motor (reliable operation at the fastest speed setting).
FLA: Full Load Amps. (A), which is the full load current of the indoor fan motor (reliable operation at the fastest speed setting).

44 Installation

Schematic figure of the main terminal blocks of main control board

CN10

CN6

CN2

M1 M2 X1 X2 P Q E D1(X) D2(Y) Terminals of communication line

CN55
Terminals of remote switch signal
T1

CN22

CN1

3 2 N
Terminals of strong current sterilization
module

1
Terminals of alarm signal
output

L N
Power cable and earth line terminals

Water level switch

Display panel

T2 T2B

Water pump Electronic expansion valve T2A

Caution
All weak point connection points meet SELV, such as X1, X2, P, Q, E, M1, M2, CN18, CN55 etc.
Wiring
1 Open the IDU’s electric control box cover.
Remove the two screws at the positions shown in the figure; Remove the three screws on both sides of the electronic control box; Pull the bottom end of the electric control box cover horizontally outward; Remove the electric control box cover.

Screws (two)

Screws (three)

2 Connect the strong current wires (power cable, alarm signal output wire, and strong current sterilization wire) and weak current wires (communication wring, display box connection wire, remote switch connection wire, function expansion board connection wire) to the electric control box through the bottom of the electric control box, and the strong and weak current inlets.

45 Installation

Weak current inlet
Communicati on line and display box cable

Strong current inlet
Power cable and ground wire, etc.

Caution
Strong and weak current wires must be separated. Alarm signal output, strong current sterilization, and remote switch are custom or optional.

3 Power supply cable connection

Connection between the power supply cable and power supply terminal

The power supply terminal of the indoor unit is fixed on the main control board, the power supply cable is connected to the power supply terminal labeled “CN1” on the main control board. The live and neutral wires are connected according to the main control board logos “L” and “N”, and the earth wires is directly connected to the electric control box sheet metal part.

Main control board CN1

Power input

Electric control box sheet metal part

Caution
A Do not bond and connect the power supply cable. Bonding and connecting the power supply cable may cause it
to heat up, resulting in a fire.

B The power supply cable must be crimped reliably
using an insulated circular terminal block, and then connected to the power supply terminal of the indoor unit, as shown in the figure below.
Insulation sleeve

C If it fails to crimp the insulated circular terminal block
due to on-site limitations, connect the power supply cables of the same diameter to both sides of the power supply terminal block of the indoor unit, as shown in the figure below.
Connect wires of the same diameter on both sides.

Circular terminal block

Power supply cable

46 Installation

D Do not press the power supply cables of the same wire diameter on the same side of the terminal. Do not use two
power supply cables of different wire diameters for the same terminal blocks; otherwise, they can easily loosen due to uneven pressure and cause accidents, as shown in the figure below.

Do not connect wires of the same diameter on the same side.

Do not connect wires of different diameters.

E The connected power supply cable should be
secured with a wire clamp to prevent loosening, as shown in the right figure.

47 Installation

Power supply cable system connection
Power supply cable system connection depends on the forms of communication between the indoor unit and outdoor unit. For the HyperLink (M1M2) communication form, indoor units are allowed to have independent power supplies. For other communication forms, indoor units should be provided with uniform power supplies.

A

Master outdoor unit
CN23

Communication wire Power supply cable

M1 M2

La

Lx

L1

Power supply for indoor unit

Power supply for indoor unit

M1 M2 CN1
CN10 L N Indoor unit 1#

×× Circuit breaker
··· Indoor unit 2-9#

M1 M2 CN1 CN10 L N IDU 10#

×× Circuit breaker

TO DOWN INDOOR UNIT

CN2

M1 M2

CN3

M1 M2 TO UP INDOOR UNIT

HyperLink repeater 1

TO DOWN INDOOR UNIT

CN2

M1 M2

CN3

M1

M2 TO UP INDOOR UNIT

HyperLink repeater 2

Ly

Lb

Power supply for indoor unit

M1 M2 CN1

×× Circuit breaker

CN10 L N Indoor unit 20#

··· Indoor unit 12-19#

L11

Power supply for indoor unit

M1 M2 CN1

××

Circuit breaker

CN10 L N Indoor unit 11#

L21

Lc

Power supply for indoor unit

M1 M2 CN1

×× Circuit breaker

CN10 L N Indoor unit 21#

··· Indoor unit 22-28#

L30 Power supply for indoor unit

M1 M2 CN1

×× Circuit breaker

CN10 L N Indoor unit 29#

Power supply for indoor unit

M1 M2 CN1

××

Circuit breaker

CN10 L N Indoor unit 30#

Caution
When the indoor units are provided with independent power supplies, the indoor units in the same refrigerant system should be V8 indoor units, and the communication between indoor units and outdoor unit adopts a HyperLink (M1M2) with an independent power supply.
This connection method has the function of an independent power supply, so in the same refrigerant system, the number of indoor units must not exceed 30 sets, and a maximum of only two repeaters may be installed.
One repeater shall be added for every 10 indoor units or a communication distance of 200m added.

48 Installation

B Indoor units are provided with uniform power supply*, which are wired as follows:
1. HyperLink (M1M2) communication with the uniform power supply:

Power supply for indoor unit Circuit breaker ××

L1+La+Ln 2000m Wire diameter: 0.75mm2

Distribution box

Distribution box

Communication wire Power supply cable

Master outdoor unit
CN23
M1 M2

Indoor unit 1#

CN10

CN1

M1 M2 L N

L1

… 2-(n-2)# Indoor unit
La

Indoor unit (n-1)#

CN10

CN1

M1 M2 L N

Indoor unit n# CN10 CN1
M1 M2 L N
Ln

2. P/Q communication:
Power supply for indoor unit Circuit breaker ××
Distribution box

Distribution box

Communication wire Power supply cable

Master outdoor unit
CN22
PQ

Indoor unit 1#

CN6

CN1

PQL N

L1

… 2-(n-2)# Indoor unit

Indoor unit (n-1)#

CN6

CN1

PQ L N

La

Indoor unit n# CN6 R

CN1

P QL N

Ln

Use shielded cables and ground the shield layer.
3. P/Q/E communication:
Power supply for indoor unit Circuit breaker ××

Distribution box

Distribution box

Master outdoor unit
CN22
P QE

Indoor unit 1# CN6

CN1

PQE L N

L1

… 2-(n-2)# Indoor unit

Indoor unit (n-1)#

CN6

CN1

PQE L N

La

Ln

Communication wire Power supply cable

Indoor unit n# CN6 R

CN1

PQE L N

Use shielded cables and ground the shield layer.

49 Installation

Caution
When the indoor units are provided with a uniform power supply, if the indoor units in the same refrigerant system are V8 indoor units, then indoor units and outdoor unit can communicate either via HyperLink (M1M2) with a uniform power supply, or via P/Q. If some of the indoor units in the same refrigerant system are non-V8 series, then indoor units and outdoor unit can only communicate via P/Q/E communication. Both P/Q communication and HyperLink (M1M2) communication are indoor and outdoor communication, and only one of them can be selected. Do not connect P/Q communication and HyperLink (M1M2) communication at the same time in the same system. Do not connect HyperLink (M1M2) communication to D1D2 communication.
Note
V8 indoor units : with V8 printed on the packaging carton Independent power supply : With separate circuit breakers, the power supply for each indoor unit can be controlled independently. Uniform power supply : All the indoor units in the system are controlled by one circuit breaker. Repeater : power supply repeater, which is used to compensate for the voltage drop due to excessive length of line or line resistance when the main control board of outdoor unit provides independent power supply for indoor units through the HyperLink (M1M2) communication wiring. It is only used in refrigerant systems where indoor units are provided with an independent power supply. Wiring diagram of main power cable
Warning
The main power cable requires additional protection conduit for fixed wiring.
50 Installation

4 Communication wiring connection

Selection of communication method for indoor units
Equipped with independently developed HyperLink (M1M2) communication, V8 series indoor units also preserve the previous RS-485 (PQE) communication method. They are compatible with non-V8 indoor units. Pay attention to the type of indoor unit before connecting communication wiring Please refer to the following table to select an appropriate communication method.

Indoor unit type

Optional communication method between indoor units and outdoor unit

Remarks

Are all the indoor units in the system
V8 series
Are some of the indoor units in the system non-V8 series

HyperLink (M1M2) communication RS-485 (PQ) communication RS-485 (PQE) communication

1. Independent power supply for indoor units*.
2. Any topology connection of communication wiring.
3. Two-core and non-polar communication for M1M2.
1. The indoor units need to be powered uniformly.
2. The communication cables must be connected in serial.
3. Two-core and non-polar communication for PQ.
1. The indoor units need to be powered uniformly.
2. The communication cables must be connected in serial.
3. PQE cables must be 3-core and PQ non-polar.

Table of selection of communication wiring diameter

Function

Indoor unit and outdoor unit communication

One controller to one indoor
unit (Two controllers to one indoor unit) Communication

One-to-more (centralized controller) Communica-
tion

Separately

HyperLink (M1M2) communication (Indoor
units are powered independently)

HyperLink (M1M2) communication (Indoor units are
powered uniformly)

P/Q communication (Indoor units are powered uniformly)

P/Q/E communication
(Indoor units are powered
uniformly)

X1X2 communication

D1D2 communication

Wire diameter

2 × 1.5mm2 Wire resistance 1.33/100m

2 × 0.75mm2

2 × 0.75mm2 (shielded cable)

3 × 0.75mm2 2 × 0.75mm2 (shielded cable) (shielded cable)

2 × 0.75mm2 (shielded
cable)

Length

600m (add two repeaters)

2000m

1200m

1200m

200m

1200m

51 Installation

Caution
Please select the communication wring according to the requirements in the above reference table. Use shielded cables for communication when strong magnetism or interference is present. On-site wiring must comply with the relevant regulations of the local country/region and must be completed by professionals. Do not connect the communication wring when the power is on. Do not connect the power supply cable to the communication terminal; otherwise, the main control board may be damaged. The standard value of the screw torque of the communication wring terminal is 0.5N·m. Insufficient torque may cause poor contact; excessive torque may damage the screws and power supply terminals. Both HyperLink (M1M2) communication and PQ communication are internal and external, so only one of the two can be selected. Do not connect both HyperLink (M1M2) communication wring and PQ communication wring to the same system, otherwise the indoor unit and outdoor unit cannot communicate normally. If some of the indoor units in the same refrigerant system are non-V8 series, only P/Q/E communication can be selected for the indoor unit and outdoor unit communication. The three-core shielded cable of 3×0.75mm2 is required to connect “P”, “Q”, and “E”. Do not bundle the communication wring with the refrigerant pipeline, power supply cable, etc. When the power supply cable and the communication wring are laid in parallel, a distance of more than 5cm should be maintained to prevent interference from the signal source. When the construction personnel of the indoor unit and outdoor unit are working separately, information communication and synchronization are required. Do not connect the outdoor unit to HyperLink (M1M2) and the indoor unit to PQ. Do not connect the outdoor unit to PQ and the indoor unit to HyperLink (M1M2). Bonding and connecting the communication wring should be avoided, but if it is used, at the very least, ensure a reliable connection by crimping or soldering and make sure the copper wire at the connection is not exposed; otherwise, communication failure may occur.
52 Installation

Indoor unit and outdoor unit communication

A HyperLink (M1M2) communication (with independent power supply)
Single unit: HyperLink (M1M2) communication is a new type of indoor unit and outdoor unit communication technology. When the indoor units are provided with independent power supplies, use 2×1.5mm2 communication cables. M1 and M2 ports are located at terminal block “CN10” of the main control board. There is no distinction between negative and positive electrodes. For details, see the following figure:

Main control board

CN10 M1 M2

Caution

Connect to outdoor unit M1M2 (HyperLink)

Do not connect the HyperLink (M1M2) communication wring to the PQ or D1D2 communication wring.

System: The HyperLink (M1M2) communication wring with an independent power supply between indoor unit and outdoor unit can reach a length of up to 600 meters, supporting any topology connection. The following figure shows a serial connection:

Master outdoor unit
CN23

M1 M2

La

L1

Power supply for indoor unit

M1 M2 CN1
CN10 L N Indoor unit 1#

×× Circuit breaker
… Indoor unit 2-9#

Communication wire Power supply cable

Lx

Power supply for indoor unit

M1 M2 CN1

×× Circuit breaker

CN10 L N Indoor unit 10#

TO DOWN INDOOR UNIT

CN2

M1 M2

CN3 M1 M2 TO UP INDOOR UNIT

HyperLink repeater 1

TO DOWN INDOOR UNIT

CN2

M1 M2

CN3 M1 M2 TO UP INDOOR UNIT

HyperLink repeater 1

Ly

Power supply for indoor unit

M1 M2 CN1

×× Circuit breaker

CN10 L N Indoor unit 20#

Lb
… Indoor unit 12-19#

L11

Power supply for indoor unit

M1 M2 CN1

×× Circuit breaker

CN10 L N Indoor unit 11#

L21

Lc

Power supply for indoor unit

M1 M2 CN1
CN10 L N Indoor unit 21#

×× Circuit breaker
… Indoor unit 22-28#

L30

Power supply for indoor unit

×× Circuit breaker

M1 M2 CN1

M1

Power supply for indoor unit

CN1

× Circuit breaker

CN10 L N Indoor unit 29#

CN10 L N Indoor unit 30#

L1+La+Lx 200m L11+Lb+Ly 200m L21+Lc+L30 200m
For other connection methods (tree topology, star topology, ring topology), please refer to the technical manual or consult technical personnel.

53 Installation

Caution
If the total length is less than or equal to 200m and the total number of indoor units is less than or equals to 10 sets, the electronic expansion valve in indoor unit can be powered and controlled by the master outdoor unit.
If the total length is longer than 200m or the total number of indoor units is more than 10 sets, a repeater is required to increase the bus voltage.
The limit of one repeater is 200m cable length or maximum 10 indoor units.
A maximum of two repeaters can be installed in the same refrigerant system.
HyperLink (M1M2) communication can control the electronic expansion valve in indoor unit indenpently, this function requires the maximum number of indoor units in the same refrigerant system must be less than or equal to 30 sets.
The repeaters and the outdoor units must connect to an unified power supply system, or the repeater uses an uninterruptible power supply.
Refer to the Installation and Operation Manual of repeater for detail.
For one repeater application, commucation cable among the master outdoor unit, indoor units and repeater must use the CN3 port in repater, the commucation cable among repeater and the rest indoor units must use the CN2 port in repeater.
For two repeaters application, the commucation cable among the master outdoor unit, indoor units and repeater 1 must use the CN3 port in repater1, the commucation cable among repeater 1, indoor units and repeater 2 must use the CN2 port in repeater 1 and CN3 port in repeater 2.
The electronic expansion valve in indoor unit can be powered and controlled by the master outdoor unit If a separate power supply applied for indoor units.
The repeater is opitional, contact dealer for detail.

B HyperLink (M1M2) communication (with uniform power supply)
Single unit: When the indoor units are provided with uniform power supply, it is not necessary for HyperLink (M1M2) communication wring to provide an independent power supply for indoor units. In this case, use 2×0.75mm2 communication cables. M1 and M2 ports are located at terminal block “CN10” of the main control board. There is no distinction between negative and positive electrodes. For details, see the following figure:

Main control board

CN10 M1 M2

Connect to outdoor unit M1M2 (HyperLink)
Caution
Do not connect the HyperLink (M1M2) communication wring to the PQ or D1D2 communication wring.
54 Installation

System: The HyperLink (M1M2) communication wring with a uniform power supply between indoor unit and outdoor unit can reach a length of up to 2000 meters, supporting any topology connection. The following figure shows a serial connection:

Power supply for indoor unit Circuit breaker ××

Communication wire Power cable

Distribution box

Distribution box

Master outdoor unit
CN23
M1 M2

Indoor unit 1# CN10 CN1
N

L1

… 2-(n-2)# Indoor unit

Indoor unit (n-1)# CN1
M1 M2 L N

La

Ln

Indoor unit n# CN10 CN1
M1 M2 L N

L1+La+Ln 2000m For other connection methods (tree topology, star topology, ring topology), please refer to the technical manual or consult technical personnel.
Caution
When HyperLink (M1M2) with a uniform power supply is available, a uniform power supply for indoor units is required. For details, see “Power Cable Connection”. When HyperLink (M1M2) with a uniform power supply is available, there is no need to connect a repeater to the system.
C P/Q communication
Single unit: Use a shielded cable for the P/Q communication and properly ground the shield layer. P and Q ports are located at terminal block “CN6” of the main control board. There is no distinction between negative and positive electrodes. Connect the shield layer to the sheet metal of the electric control box, as shown in the following figure:
Main control board CN6

PQ Electric control box sheet metal part
Connect to the outdoor unit PQ

55 Installation

System: The maximum total length of the P/Q communication cable of the Indoor unit and outdoor unit can be up to 1200m, and can be connected in serial, as shown in the figure below:

Power supply for indoor unit Circuit breaker ××

Communication wire Power cable

Distribution box

Distribution box

Master outdoor unit
CN22
PQ

Indoor unit 1# CN6

CN1

P QL N

L1

… 2-(n-2)# Indoor unit

Indoor unit (n-1)#

CN6

CN1

P QL N

La

Indoor unit n# CN6 R

CN1

P QL N

Ln

Use shielded cables and ground the shield layer.
L1+La+Ln 1200m
D P/Q/E communication
If some of the indoor units in the same refrigerant system are non-V8 series, it is required to connect “P”, “Q”, and “E” for P/Q/E communication. Single unit: Use a shielded cable for the P/Q/E communication and properly ground the shield layer. P,
Q, and E ports are located at terminal block “CN6” of the main control board. There is no distinction between negative and positive electrodes. Connect the shield layer to the sheet metal of the electric control box, as shown in the following figure:
Main control board PQ E

CN6

Electric control box sheet metal part

Connect to the outdoor unit PQE

System: The maximum total length of the P/Q/E communication cable of the indoor unit and outdoor unit can be up to 1200m, and can be connected in serial, as shown in the figure below:

Power supply for indoor unit

Circuit breaker ××

Communication wire Power cable

Distribution box

Distribution box

Master outdoor unit
CN22
P QE

Indoor unit 1# CN6

CN1

PQE L N

L1

… 2-(n-2)# Indoor unit

Indoor unit (n-1)#

CN6

CN1

PQE L N

La

Indoor unit n# CN6 R

CN1

PQE L N

Ln

L1+La+Ln 1200m

Use shielded cables and ground the shield layer.

56 Installation

Caution
When P/Q or P/Q/E communication is used, the indoor units need to be powered uniformly. Either P/Q, P/Q/E communication or HyperLink (M1M2) communication can be selected. If it is required for indoor units to have independent power supplies, then HyperLink (M1M2) communication must be selected. Use only shielded cables for P/Q or P/Q/E communication. Otherwise, the indoor unit and outdoor unit communication may be affected. A matching resistor needs to be added to the last indoor unit on the PQ (in the accessory bag of the outdoor unit).
X1/X2 communication cable connection The X1X2 communication wring is mainly connected to the wired controller to achieve one controller per indoor unit and two controllers per indoor unit. The total length of the X1X2 communication wring can reach 200 meters. Please use shielded wires, but the shield layer cannot be grounded. X1 and X2 ports are located at terminal block “CN6” of the main control board. There is no distinction between negative and positive electrodes. For details, see the following figure:

Main control board X1X2
CN6

Main control board X1X2
CN6

L1

L2

One controller to one indoor unit

L1 200m, L2+L3 200m.

L3
Two controllers to one indoor unit (Master-slave wired controller
needs to be set. For details, see the wired controller manual.)

Caution
Two wired controllers of the same model can be used to control one indoor unit at the same time. In this case, need to set one controller to be the master and the other to be the slave. For details, see the wired controller manual.

57 Installation

D1D2 communication wring connection (limited to outdoor unit and system configuration)
A Achieving one-to-multiple and two-to-multiple functions of the indoor unit wired controller through D1D2
communication (a maximum of 16 sets) D1D2 communication is 485 communication. The one-to-more and two-to-more functions of the indoor unit wired controller can be achieved through D1D2 communication, as shown in the figure below:

Indoor unit 1#

X1 X2

D1 D2

CN6

CN2

Indoor unit 2# D1 D2
CN2
L3

Indoor unit 16#

… Indoor unit 3-15#

D1 D2 CN2

Ln

L1

L2

Use shielded cables and ground the shield layer.

Please use shielded wires, and the shield layer cannot be grounded.

X1 X2 Wired controller

X1 X2 Wired controller

The indoor unit can realize the one-to-more and two-to-more functions. (master-slave wired controller needs to be set)

L1+L2 200m, L3+Ln 1200m
Caution
When the indoor units in the same refrigerant system are V8 indoor units, D1D2 communication can enable one-tomultiple and two-to-multiple functions of the indoor unit wired controller. To enable two-to-multiple functions, wired controllers must be of the same model.

B Achieving centralized control of the indoor unit through D1D2 communication
The D1D2 communication wring can also be connected to the centralized controller to achieve centralized control of the indoor unit, as shown in the figure below:

Indoor unit 1# D1 D2
CN2

Indoor unit 2# D1 D2
CN2

… 3-(n-1)# Indoor unit

Indoor unit n# D1 D2
CN2

L3

Ln

L1

Use shielded cables and ground the shield layer.

XY Centralized controller
L1+L3+Ln 1200m

58 Installation

5 Alarm signal output, strong current sterilization connection (customized function)

The alarm signal output and strong current sterilization power supply terminals are located on the main control board. The alarm signal output and strong current sterilization modules are connected to the power supply terminal with the bit number “CN22” on the main control board, and the alarm signal output and strong current sterilization module share the neutral line and are connected according to the following schematic diagram:

Main control board

CN22 N

Output voltage: 220 VAC; Maximum output power: 220 W
Strong current sterilization module

Alarm signal output
Output voltage: 220 VAC; Maximum output power: 220 W

Caution
Alarm signal output and strong current sterilization are customized functions.
6 Remote switch signal wiring (customized function)
Terminal block “CN55″ of the main control board is used for remote switch signal. Connect cables to the first and second binding posts (the third binding post is not functional) according to the label on the main control board, as shown in the following figure:
Main control board CN55

IN GND
Remote switch signal
7 Reinstall the electric control box cover
Straighten out the connecting wires and lay them flat, and install the electric control box cover.

Caution
Do not cover the electric control box during power-on. When covering the electric control box, arrange the cables carefully and do not clip the connecting wires on the electric control box cover.
59 Installation

8 Error Codes

Error Codes and Definitions

In the following circumstances (warning failures excluded), please stop the air conditioner immediately, cut off the power switch and contact the local air conditioner customer service center. The error code is displayed on the display box and the wired controller display.

Error

Error code

Digital display

Emergency stop

A01

R32 refrigerant leaks, requiring shutdown immediately

A11

Outdoor unit fault

A51

The fault of the linked FAPU is transmitted to the master indoor unit (series setting)

A71

The fault of the linked humidifying indoor unit is transmitted to the master indoor unit

A72

The fault of the linked FAPU is transmitted to the master indoor unit (nonseries setting)

A73

The fault of the AHU Kit slave unit is sent to the master unit

A74

Self-check fault

A81

MS (refrigerant flow direction switching device) fault

A82

Mode conflict (V6 communication protocol adopted)

A91

1# EEV coil fault

b11

1# EEV body fault

b12

2# EEV coil fault

b13

2# EEV body fault

b14

Stall protection on 1# water pump

b34

Stall protection on 2# water pump

b35

Water level switch alarm

b36

Reheating electric heater fault

b71

Preprocessing electric heater fault

b72

Humidifier fault

b81

Duplicate indoor unit address code

C11

60 Installation

Error
Abnormal communication between the indoor unit and outdoor unit Abnormal communication between the indoor unit main control board and fan drive board Abnormal communication between the indoor unit and wired controller

Error code C21 C41 C51

Abnormal communication between the indoor unit and Wi-Fi Kit

C52

Abnormal communication between the indoor unit main control board and display board

C61

Abnormal communication between the AHU Kit slave unit and master unit

C71

Number of AHU Kits is not the same as the set number

C72

Abnormal communication between the linked humidifying indoor unit and master indoor unit

C73

Abnormal communication between the linked FAPU and master indoor unit (series setting)

C74

Abnormal communication between the linked FAPU and master indoor unit (non- series setting)

C75

Abnormal communication between the main wired controller and secondary wired controller

C76

Abnormal communication between the indoor unit main control board and 1# Expansion board

C77

Abnormal communication between the indoor unit main control board and 2# Expansion board

C78

Abnormal communication between the indoor unit main control board and adapter board

C79

Air inlet temperature of the indoor unit is too low in heating mode

d16

Air inlet temperature of the indoor unit is too high in cooling mode

d17

Alarm for exceeding temperature and humidity range

d81

Sensor control board fault

dE1

PM2.5 sensor fault

dE2

CO2 sensor fault

dE3

Formaldehyde sensor fault

dE4

INTELLECTUAL EYE sensor fault

dE5

T0 (fresh inlet air temperature sensor) short-circuits or cuts off

E21

The upper dry bulb temperature sensor short-circuits or cuts off

E22

The lower dry bulb temperature sensor short-circuits or cuts off

E23

T1 (Indoor unit return air temperature sensor) short-circuits or cuts off

E24

Digital display

61 Installation

Error The built-in room temperature sensor of the wired controller short- circuits or cuts off The wireless temperature sensor short-circuits or cuts off The external room temperature sensor short-circuits or cuts off Tcp (pre- cooled fresh air temperature sensor) short-circuits or cuts off Tph (pre- heated fresh air temperature sensor) short-circuits or cuts off TA (outlet air temperature sensor) short-circuits or cuts off Outlet air humidity sensor fault Return air humidity sensor fault Upper wet bulb sensor fault Lower wet bulb sensor fault R32 refrigerant leakage sensor fault T2A (heat exchanger inlet temperature sensor) short-circuits or cuts off T2 (heat exchanger middle temperature sensor) short-circuits or cuts off T2 (heat exchanger middle temperature sensor) overtemperature protection T2B (heat exchanger outlet temperature sensor) short-circuits or cuts off Main control board EEPROM fault Indoor unit display control board EEPROM fault Locked (electronic lock) Unit model code not set Horsepower code not set Horsepower code setting error AHU Kit fan control input signal DIP setting error Address code not detected Motor failed more than once IPM (fan module) overcurrent protection Instantaneous overcurrent protection for phase current
62 Installation

Error code E31 E32 E33 E61 E62 E81 EA1 EA2 EA3 EA4 EC1 F01 F11 F12 F21 P71 P72 U01 U11 U12 U14 U15 U38 J01 J1E J11

Digital display

Low bus voltage fault

Error

High bus voltage fault

Phase current sample bias error

Motor and indoor unit are unmatched

IPM and indoor unit are unmatched

Motor startup failure

Motor blocking protection

Speed control mode setting error

Phase lack protection of motor

Error code J3E J31 J43 J45 J47 J5E J52 J55 J6E

Digital display

Operating Status Codes and Definitions (Non-Error)

Definition Oil return or preheating operation Self-cleaning Mode conflict (V8 communication protocol adopted) Defrosting Static pressure detection Remote shutdown Indoor unit backup operation outdoor unit backup operation Main control program upgrading

Code d0 dC dd dF d51 d61 d71 d72 OTA

Digital display

Caution
Error codes are displayed only for certain outdoor unit models and indoor unit configurations (including the wired controller and display box). When the main control program is being upgraded, make sure that the indoor unit and outdoor unit remain powered on. Otherwise, the upgrading process will stop.
63 Installation

Spot Check Description

Use the bi-directional communication wired controller (for example, WDC3-86S) to activate the spot check function in the following steps:
On the main page, hold ” ” and “” for 2s to enter the query page. The wired controller displays “CC”. Press “” or “” key to select the indoor unit address n00-n63 (indicating the address of a specific indoor unit), and press the ” ” key to enter the parameter query page.
Press the “” or “” key to query the parameters, and the parameters can be queried cyclically. See the spot check list below for details.
Press the ” ” key to exit the query function.
On the top of the query page, the “Timing area” displays the spot check serial number, and the “Temperature area” displays the content of the spot check parameters.

Hold for Selection BACK 2s to enter buttons button the page

Check No. Spot check parameters
OK key

No.

Displayed content

No.

Displayed content

Indoor unit and outdoor unit communication 1 address (current indoor unit addresses are 13
displayed every 0.5s)

Compressor discharge temperature

2

Capacity HP of indoor unit

14

Target overheating

3

Actual set temperature Ts

15

EEV opening (actual opening/8)

4

Current running set temperature Ts

16

Software version No.

5

Actual T1 indoor temperature

17

Display board version No.

6

Modified indoor temperature T1_modify

18

Fan drive version No.

7 T2 heat exchanger intermediate temperature 19

Historical error code (recent)

8 T2A heat exchanger liquid pipe temperature 20

Historical error code (sub-recent)

9 T2B heat exchanger gas pipe temperature 21

Indoor unit network address display

10

Actual set humidity RHs

22 Indoor unit expansion board address display

11

Actual RH indoor humidity

23

[] is displayed

12

Real-time static pressure

64 Installation

9 Test Run
Before the Test Run, Make Sure That
· Indoor units and the outdoor unit are properly installed. · The piping is correct, and the refrigerant piping system has been checked for leakage. · Piping length and the amount of refrigerant charged have been recorded. · The wiring is correct and firm without virtual connection issues. Earth wires have been properly connected. · The voltage of the power supply is the same as the rated voltage of the air conditioner. · Heat insulation is complete. · There are no obstructions at the air inlet and outlet of the indoor unit and outdoor unit. · Fully open the stop valves of the gas pipe and liquid pipe of the outdoor unit. · Turn on the power supply to preheat the outdoor unit for 12 hours.
Indoor unit
· The wired/remote controller switch is operating normally. · The display of the wired/remote controller is normal, the function keys work normally, the room temperature
adjustment is normal, and the air flow and direction adjustment are normal. · The LED indicator is on. · Water drainage is normal. · Check the indoor units one by one for normal operation, and the cooling and heating functions are normal
without vibration or abnormal sound.
Outdoor unit
· There are no vibrations or strange sounds during operation. · The fan, noise and condensation do not affect the neighbors. · There is no refrigerant leakage.
Note
In the event of a failure, please troubleshoot according to the “Symptoms That Are Not Faults” in the “Operation” in this manual.
65 Installation

Check List

To ensure a comfortable indoor environment, please run down through the list to check whether the installation of the air conditioner meets the requirements. Insert a “×” for Fail and a “” for Pass.

Check Item
Are the indoor units and outdoor units securely installed?

Check Criteria
The air conditioner does not fall or vibrate, and there is no noise.

Check Result (Pass/Fail)

Has the installation of the indoor unit been completed?

The unit works properly and no parts are burned out.

Has a leak test been performed?

The cold/hot air is sufficient.

Is the heat insulation in good condition (refrigerant piping, drain pipe, and air ducts)?

There is no condensation dripping.

Were the connecting pipes sealed before installation to prevent dust from entering?

The compressor is functional.

Is the refrigerant piping filled with nitrogen for shielded welding during the welding process (a nitrogen cylinder is on site)?

There is no oxide film on the inner surface of the connecting pipe. The system is functional with no major failures.

Has a water drainage test been performed? Is drainage smooth? Is the connection secure?

There is no water leakage.

Is the power supply voltage consistent with the specified voltage on the unit nameplate?

The unit works properly and no parts are burned out.

Are the wires and pipes connected correctly?

The unit works properly and no parts are burned out.

Is the air conditioner safely grounded?

There is no electric leakage.

Have wires of the specified size been used?

The unit works properly and no parts are burned out.

Are the terminal screws securely fastened?

There is no electric shock or fire.

Are the inlets and outlets of the indoor units and outdoor units free of obstruction?

The cold/hot air is sufficient.

Has the unit’s external static pressure been set for The cooling and heating functions

the indoor unit in constant speed mode?

are normal.

Has the refrigerant piping length and refrigerant charge been recorded?

The amount of refrigerant in the air conditioning system is clear.

Was an access hole reserved at the installation position of the indoor unit?
Are air filters and grilles installed (at air inlets and outlets)?

The maintenance can be easily carried out.
The unit works properly.

Does the temperature of each room meet the requirements during testing?

Users’ comfort needs can be satisfied.

Have you explained to the user how to operate the unit according to the user manual?

The unit is effective.

Have you explained to the user how to operate and clean the air filter, grille (air inlets and outlets), etc.?

The unit is effective.

66 Installation

Maintenance and Service
1 Safety Warning
Warning
For safety reasons, always turn off the air conditioner and turn off the power before cleaning the air conditioner. Do not disassemble or repair the air conditioner by yourself; otherwise, it may cause fire or other hazards. Only professional service personnel can carry out the maintenance. Do not use flammable or explosive materials (such as hair styling agents or pesticides) near the product. Do not use organic solvents such as paint thinner to clean this product; otherwise, it may cause cracks, electric shock or fire. Only qualified dealers and professionally qualified electricians can install the optional accessories. Be sure to use the optional accessories specified by local dealer. Improper installation by yourself may result in water leakage, electric shock or fire. Do not wash the air conditioner with water; otherwise, it may cause an electric shock. Use a stable standing platform.
2 Cleaning
Cleaning the Air Filter
Caution
Air filters can be used to remove dust or other particles from the air, and if clogged, the effectiveness of the air conditioner will be greatly reduced. Therefore, be sure to clean the air filter frequently when using it for an extended period. For the indoor unit with constant speed mode, if it is installed in a place with a lot of dust, it is recommended that you clean the filter once a month. For indoor units with a constant air flow mode, clean the filter when you receive the reminder of the wired controller. If excess dirt makes the filter difficult to clean, replace the filter. Do not remove the air filter unless it is being cleaned; otherwise, it may cause malfunction.
67 Maintenance and Service

1 Procedure diagram

1

Remove the air inlet grille. Hold and open the buckle at the return air inlet slowly, pull inward and press the filter buckle to remove the filter.

2 Remove the filter.
Note
Only authorised installer or service agent can change and disassemble the filter. Any improper operations may cause electric shock or injuries due to touching rotating parts.

3 Clean the filter.
Clean the filter with a vacuum cleaner, with the air inlet side of the filter facing upwards.

Clean the filter with clean water (except for the activated carbon module), with the air inlet side of the filter facing downwards.

Caution
To avoid deformation of the filter, do not use fire or a burning appliance to dry the filter. If the filter is dirty, use a soft brush and neutral detergent to clean it, then shake off the water and dry it in a cool place. Non- professionals should not disassemble, replace or repair the filter.
4 Reinstall the filter. 5 Reinstall and close the air inlet grille by following steps 1 and 2 above in reverse.
68 Maintenance and Service

Cleaning Air Outlets and Exterior Panels
1 Wipe the air outlet and panel with a dry cloth.
2 If a stain is hard to remove, clean it with clean water or neutral detergent.
Caution
Do not use gasoline, benzene, volatile agents, decontamination powder or liquid insecticides. Otherwise, the air outlet or panel may become discolored or deformed. Do not expose the inside of the indoor unit to moisture, as it may result in electric shock or fire. When cleaning the louver with water, do not scrub it violently. If the air conditioner is used without an air filter, the accumulation of dust in the air conditioner will often cause malfunctions due to the failure to remove dust from the indoor air.
Maintenance
During in-depth maintenance, the air conditioner should be cleaned and maintained by professional technicians every 2 to 3 years.
For the indoor unit in constant speed mode, the primary efficiency filter is usually cleaned every three months. When operating in a dusty environment, the air flow and capacity of the filter will decrease. The filter may even become blocked, and the air conditioner performance and indoor air compromised.
Preheat the unit in advance. When the heating season comes, power on the outdoor unit master unit for preheating more than 12 hours before use. The preheating time depends on the weather temperature. This can make the air conditioner operate more stably and help the refrigeration oil in the air conditioner compressor to maintain the best lubrication state, which can prolong the service life of the compressor.
Complete the following steps before the air conditioner is put out of use for a long period: If the air conditioner is not in use for a long time due to seasonal changes, keep the unit running for
4-5 hours in fan mode until the unit becomes completely dry. Otherwise, it may grow mold indoors and have negative health effects. When not in use for a long time, power off or unplug the power plug to reduce standby power consumption, and wipe the wireless remote controller with a clean soft dry cloth and remove the battery. Turn on the power switch 12 hours before using the air conditioner again. In addition, in seasons when air conditioners are frequently used, keep the power switch on. Otherwise, failures may occur.
Caution
Before the air conditioner is idle for a long time, the internal components of the outdoor units should be checked and cleaned regularly. For more details, please contact the local air conditioner customer service center or special technical service department. Check the return air inlet and outlet of the outdoor unit and indoor unit after long periods of use to see if they are blocked; if an inlet/outlet is blocked, clean it immediately.
69 Maintenance and Service

3 Service

Step to dismantle the drain pan
The drain pan must first be removed during the maintenance of the internal unit assembly. Dismantle the drain pan according to the following schematic to prevent water leakage in the unit (Make sure there is no residual water in the drain pan before dismantle it).

1 Remove the panel.

2 Remove the drain pan assembly in a downward
direction

Panel

Drain pan assembly

Step to dismantle the Main Control Box and Drain Pump

1 Loosen the screws on the motor cover.
Check the circuit, components and other problems or replace the main control board. After replacing the main control board, use the after-sale tool to scan the QR code on the electric control box, and reset the model and HP of the unit.

2 Remove and repair the drain pump assembly.

Remove the electric control box cover

Drain pump assembly

Note
The electric control boards of different IDUs are not interchangeable.

70 Maintenance and Service

Step to dismantle the Motor and Fan

1 Loosen the screws on the motor cover.

2 Remove the plastic cover from the motor.
Plastic cover

3 Remove the motor to repair or replace it.

4 Remove the fan.

Motor

Fan

Step to dismantle the Evaporator
1 Follow the steps above to remove the panel, drain pan, motor, and fan. 2 Press the buckle and remove the auxiliary drain 3 Loosen the screws securing the evaporator.
pan.
Auxiliary drain pan
71 Maintenance and Service

4 Remove the evaporator.

Evaporator

72 Maintenance and Service

16126000007907 V.B

74 Maintenance and Service

75 Maintenance and Service

References

• kgf.cm

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