Hisense R90 Heat Pump Water Heater User Manual

Hisense R90 Heat Pump Water Heater

Product Information

The HI-WATER R290 is a heat pump water heater designed for installation and operation in residential and commercial settings. This product is available in two models: AH-200NH4GHB and AH-300NH4GHB.

Installation & Operation Manual

The installation and operation manual provides detailed instructions on how to properly install, operate, and maintain the heat pump water heater. It also includes important safety information. It is crucial to read the entire manual before installing and using the heat pump.

Safety Precautions

Please make sure you have read at least one chapter of safety precautions shown in the manual. This part provides quite important safe points for you and please operate it based on safety precautions.

1. Household electrics must have a reliable earth connection.
2. This product must be protected with a residual current device of adequate rating.
3. Do not interfere with any permanent instructions, labels, or warning plates attached to the external cover of this heat pump.
4. This product must only be installed by qualified personnel in the mechanical and electrical industry.
5. Always comply with local wiring regulations.
6. Always engage with a trained professional to relocate this product after it has been professionally installed.
7. Maintenance and repair work must only be undertaken by trained and qualified personnel.
8. The electrical connection to this product must be via a 20A RCD/MCB or R CBO with a test button function.
9. The final electrical connection must be via a double pole isolating switch located close to the unit. The isolating switch must never be covered up.
10. A One-way isolating valve must be installed on the cold water supply pipe for maintenance purposes.
11. This appliance should never be used by children.
12. If the power supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified personnel in order to avoid a hazard.
13. Do not operate this heat pump in a wet room such as a bathroom unless it is housed in a separate cupboard within that room.

R290 Warning

1. This appliance uses R290 (propane) refrigerant, which is a flammable gas and must be serviced by an authorized person.
2. WARNING Risk of fire/flammable material. If the refrigerant is leaking, switch off the unit at the mains and contact the service agent.
3. DO NOT store chemicals or flammable materials near this appliance.
4. NEVER use a flammable spray such as hair spray, paint, etc. near this unit as this may cause a fire.
5. Avoid the risk of injury from contact with refrigerant if you notice a leak.
6. If you suspect the refrigerant is leaking then: Do not smoke. Do not operate electrical equipment. Isolate the device.
7. End-of-life recycling
8. The refrigerant must not enter the atmosphere. Only have the refrigerant removed by a qualified professional.

General Information

Specifications

System sketch

Features

All-in-one heat pump for sanitary hot water:

1. Has complete isolation between water and electricity, without electric shock problems, more safety;
2. No fuel tubes and storage, no potential danger from oil leakage, fire, explosion, and so on;
3. The condenser coil is wrapped outside the tank, it is an external coil or microchannel, do not in contact with water directly, more safety and health health;
4. The maximum outlet water temp. temp.: 75 °C. The system makes the water be heated stably and quickly with innovative heating methods of combining electric heating and heat pump heating properly;
5. Automatic start start-up and shutdown, automatic defrosting by revising the refrigerant cycle to save the extra operation;
6. Unit absorbs heat from outdoor air and produces heat water, the c co-efficiency can be 3.5~4. (Under the condition A20/15 15°C, W15/55 55°C);
7. Within the temp. range from -7°C to 43 43°C, the unit will not be affected by night, cloudy sky, rain even snow weather;
8. Flexible installation achieved by long air inlet and outlet duct;

Application sketch

Specifications

Heating Capacity and COP at Air 20℃/15℃, Water Temp. from 15℃ to 55℃ ERP Label Level at Air 20℃/15℃ according to EN16147

Parts Description

NOTE

• All the pictures in this manual are for explanation purposes only.
• They may be slightly different from the heat pump water heater you purchased (depending on the model).
• Please refer to the real sample instead of the pictures in this manual.

Installation of Heat Pump

Choose a place

1. This product is suitable for an indoor utility room or plantroom.
2. Please ensure there is adequate space for installation and maintenance. It is recommended a head height of 300mm is required.
3. The Air inlet and outlet vents’ final connections are to be done in insulated flexible ducting with less than 0.5mtr duct length.
4. The product is to be installed in a dry and free-from-humidity location.
5. The support surface must be flat (the horizontal angle must not be more than 2°) and can hold the product’s weight when filled with water. Please refer to the technical data sheet for the product’s weight.
6. Please select a suitable location for the exhaust air vent to the outside. Always insulate the exhaust air ducting to avoid condensation when operational.
7. Please ensure there is access to the removal front panel for maintenance.
8. Always allow extra room for pipe connections and power cables.
9. Always refrain from installing on a surface with loose coverings as the product may make a vibrating noise when operating.

NOTE

• Note 1: If the product is installed in a location where there is a possibility of frost, then all precautions must be taken to ensure all pipework is sufficiently insulated and insulated.
• Note 2: The following locations are not recommended as suitable installation locations for the product.
  • a. Areas containing toxic gases or mineral oils.
  • b. The place existing strong electromagnetic
  • c. The place existing the evaporation of acid or alkaline

Transporting the product.

1. This exhaust air heat pump is heavy and requires at least two people to lift it with the assistance of lifting equipment.
2. It is always recommended to lift the product with all its packaging in place.
3. Always wear PPE when lifting the product.
4. Avoid lifting at an angle greater than 75°.

The system uses a flammable gas, therefore:

• The appliance should not be stored or transported in an area with an ignition source (eg. open flame).
• Do not pierce or burn the appliance.
• Be aware that the refrigerant may not cause an odor

The Installation of Heat Pump

1. Please leave enough space to install and maintain.
2. If a heat pump is installed in the basement, indoor, or other airtight space, please note exhausting or intake circulation between surrounding air and outdoor air; The air duct total length should be equal to or less than 6 meters, and the duct diameter should be equal or more than 150 mm.

Dimension

Products External Dimension

Pipe Line Connection

1. Pipe Line Connection Diagram

Water Pipe Installation Instructions

1. Please don’t use iron pipe connected to the heat pump, please use CPVC pipe, PPR pipe, or PB pipe;
2. Please according to the drawing shows to install the water pipes, connectors, etc., if the ambient temp. is below 0 ℃, proper insulation must be taken.
3. The water inlet/outlet size is G3/4’’, external thread;
4. The water pipe’s work life should not be less than the heat pump’s work life;
5. The relief valve is G1/2’’, 0.8 MPa, after installation, must sure that the drainage pipe which connects with the relief valve, is not blocked;

NOTE

• The relief valve needs to be pulled once time every six months for the purpose of taking calcium carbonate out and ensuring no obstacle, or outlet temp. of drainage port may be high, please be careful;
• Drainage pipe must be taken precautions to prevent it from freezing..

CAUTION

• Do not hold down the handle of the safety valve;
• Do not knock down the safety valve;
• Do not plug the drainage port;
• The excretion pipe must be connected with an open drainage port.
• After finishing all pipelines, open up the valve-controlled cold water inlet and the valve-controlled hot water outlet to fill water into the tank, you can stop when you find water overflows from the water outlet, then inspect all pipelines and make sure have no water leakage.
• When intake pressure is below 0.15MPa, a booster pump needs to be installed to connect with the inlet water pipe for the purpose of obtaining larger water capacity, which can make sure the intake pressure is less than 0.15MPa; When intake pressure is greater than 0.65MPa, the relief valve needed to be installed to connect with inlet water pipe for purpose of keeping your water tank into a long long-term working state;
• During the heat pump running, condensed water droplets may be formed, drainage water port may be unexpectedly blocked, which can make the surface of the equipment drop water out, to ensure your normal life and your equipment, we suggest a water tray, please take reference to the below chart.

NOTE: When used for the place where the temp. is below 0 0℃， If the heat pump is outdoors, please take precautions to protect the water pipe according to local minimum temperature to prevent frozen or damaged water pipe.

Installation Instructions

Air Duct Installation Instructions

1. Scheme ② It is recommended to install the unit this way in the winter when there is another heat source in the room. (The heat pump is installed in the room)
2. Scheme ③ It is recommended to install a unit in this way in summer that could charge fresh cold air into the room. (The heat pump is installed in the room)
3. It is recommended to install the unit with only an air outlet with duct (Scheme ②) in summer that could charge fresh cold air into the room. (The heat pump is installed outdoors);
4. It is recommended to install the unit with only an air inlet with duct Scheme ③ in winter when there is another heat source in the room. (The heat pump is installed outdoors);
5. Duct Description:

1. The resistance of the duct will decrease the air flow rate, which will lead to the capacity of unit, the duct total length should be no more than 6m or the maximum  static pressure should be within 20Pa, and the quantity bending should be no more than three;
2. For the unit air outlet with duct, when the unit operating, condensate will be generated around the outside of the duct, please pay attention to the drainage work, we suggest wrapping the thermal insulated layer around the outside of the duct;
3. It is recommended to install the unit in the indoor space. It is not allowed to install the unit outdoors or exposed to rain;
4. In terms of the main unit connecting with canvas reaching outdoors, a reliable water water-resistant measure must be conducted on the duct, to resist water dropping into the internal of the main unit;
5. Filter should be installed at the unit inlet if the air inlet is not connected with the duct. In terms of the unit with duct, the filter should be put on the position of the duct inlet.

Power Connection

NOTE

• The equipment must apply a specific power supply, supply voltage must comply with the rated voltage;
• The power supply circuit must be fitted with ground wire, and the ground wire of the power supply must be reliably connected with external ground wire;
• The operation must be worked by professional personnel based on the circuit diagram;
• Set up leakage protection device well according to the National Technical Standard for electrical equipment;

Power Specification

Item Model| Power supply| The finest wire diameter (mm2)| Manual switch (A)| Leakage protection device
---|---|---|---|---
AH-200NH4G HB AH 300NH4G HB| 230V/50Hz| Size (continuous

length ≤ 30m)

| Ground wire| Capacity| Fuse| Below 30mA 0.1sec
≥2.5| ≥Φ1.0mm| ≥20| 20

Remark: Please directly connect the power supply wire with the user’s plug when using the heat pump.

Leakage Protection WARNING

• The external power supply box must be installed leakage protection device based on the above figure for the purpose of your safe;
• The equipment can be used unless you have confirmed ground wire reliably;

Notes of Application

When using the unit, please operate in the following order:

1. Feeding water: when using the unit for the first time (or reusing it after the tank is empty), before connecting the unit with power, please make sure the tank is full of water. Water feeding method (as below picture)
2. Plug in with power on then the screen brightens. The user can realize different models by clicking the relative button on the screen (see next page); Water temperature over 50  50℃ can have burn risk for cause burns for children, disabled, and elder elders. Feel water before bathing or showering. Water temperature limiting valves are recomm recommended.
3. Water draining: before cleaning or moving the unit, please drain out the water in the water heater. The draining method is as below picture:

Instruction of operation

Control system specifications

1. Operating condition
   • Voltage: 230V ～±10%,50Hz±
   • Ambient temp. temp.: -7～+43 ℃
   • Storage temp. temp.: -20 ～+75 ℃
   • Relative humidity: 0 0～95%RH
   • temp. accuracy: ±1 1℃
2. Main function
   • Display the pool temp. and setting temp.temp., and also can query the coil temp.temp., ambient temp. and exhaust temp. and so on.
   • Power cut memory function. When power is cut, the clock will still work.
   • Timing on/off. KeyKey-Lock Function
   • Automatic defrosting. Forced to defrost. AntiAnti-freezing function
   • Large LCD display.
   • Has perfect protection function.
   • The error code display and query
   • When there Is no wire controller or wire controller, the system can recognize it, and control the heat pump to run automatically.

Wire controller and operation

Controller Instruction

Instruction of the buttons

Operation Instruction

1. turn ON/OFF the heat pump
   When the controller is in the normal display state, press “ ” button for more than 1 second to switch the controller to the power on or off state. When the heat pump is ON,“ ” lights up and is normally controlled. When the heat pump is off,“ ”does not light up and the controller stops controlling output. The controller can display and operate normally in the power on state and off state. When the controller is powered on for the first time, it is in the off state. Then from the 2 2nd time, the state will be the same as last time before power off.

2. Set the water temp. temp.:
   Power on when the unit standby, and press the “∧” or “ ∨” key to enter the water temp. setting state. Then starts to display the setting symbol and display the corresponding water temp. set according to the current heating mode. When the water temp. is set, press the “ “∧” or “ ∨” button to increase or decrease the water temp. setting value; Press and hold the “ “∧” or “ ∨” button for more than 1 second to quickly increase or decrease the water temp. setting. Press and release the “ ” button immediately or no button operation in 5 seconds, the controller will exit the modification and return to the normal display state. When the parameter value is modified, it will flash for 2 seconds and then return to the normal display state.

3. Real-time clock settings:
   In the main interface, click the “ ” button to enter the real real-time clock setting into the interface; In the real real-time clock interface, press the “ ” button, the hour part of the number flashes, press “ “∧” or “ ∨”, you can set the hour of the clock; when the hour part is set, press the “Time” button again, the number of minutes will flash, press “ “∧” or “ ∨” to set the minute of the real-time clock; After the minute part is set, press the “ ” button again to confirm the real real-time clock setting and return to the main interface; In the real real-time clock setting interface, if there is no button operation for 5 seconds, the current real real-time clock setting value is confirmed, and the main interface is returned; In the real real-time clock setting interface, press the “ ” button to confirm the current real-real-time clock setting value and return to the main interface.

4. Timing work settings:
   Press and hold the “ ” button for 3 seconds in the main interface to enable or disable the timed working mode. When the timed working mode is enabled, enter the timed period setting. Press and release “ ” to switch the hour and minute of the start time and end time of the three time slots in sequence., The value is flashing when switching to the corresponding value of a certain time slot. At the same time, the “ON” or “OFF” symbol flashes, Press “∧” or “ ∨” to increase or decrease the corresponding value. After setting the timed period, click the “switch” button or no button operation in 15 seconds, the changes can be saved and returned to the normal display state. When the timing control mode is enabled, the corresponding symbols are displayed in the working period (ON) and the non-working period (OFF) respectively. In the power power-on state, heating is performed only during the set working period, and the rest of the time is not heating. When the start time and end time of a certain working period are the same, it is regarded as canceling the timing period. When all timed periods are canceled, it is considered to be in working hours throughout the day. If the start time of a certain working period is greater than the end time, the end time is considered to be the next day. The three time periods default to 05:00~07:00, 16:00~18:00, and 20:00~00:00.

5. Forced quick heating:
   When the following conditions are met at the same time: the controller is in the normal display state and the heat pump is in the power power-on state. The heat pump needs to be in the working period after the timing control is enabled. The current heating mode is met and the temp. condition for continuing heating is satisfied, No other alarms that do not allow ” quick heating” occur. Press the “M” + “ “∧” button at the same time for more than 5 seconds, and the quick heat” function can be activated or deactivated deactivated. The icon lighting “ ”indicates that the electrical heating is working.

6. Query running status:
   When the main interface of the power on or off is displayed, press and hold the “ “∧” or “ “∨” button for more than 3 seconds to enter the running status query interface; Click the “ “∧” or “ ∨” button to view each status; Click the “ “” button or automatically ret urn to the normal display state without any button operation in 30 seconds.

After entering the view mode, the last viewed data code and its corresponding value are displayed below table table. (the default is “00” after power power- on)on).

inlet water temp. (tank

water temp.)

| 09| Display value = measured value +

compensation value

outlet water temp. (return

water temp.)

| 10| Display value = measured value +

compensation value

compressor| 11| 0＝stop；1＝running
4-way valve| 12| 0＝stop；1＝running
high-speed fan| 13| 0＝stop；1＝running
low-speed fan| 14| 0＝stop；1＝running
electric heater| 16| 0＝stop；1＝running

Key lock:
When the controller is in the normal display state, the button is locked when there is no button operation for more than 60 seconds. Press any button at this time to unlock.

High temp. disinfection function
Manual disinfection mode: While the controller is in normal display state, press and hold the “M”+“ M”+“∧”+“ ∨” button for more than 5 seconds at the same time, the heater symbol flashes to indicate that it enters the manual disinfection mode. At this time, the electric heater is started to heat the water to 75 75℃, And the water temp. is maintained at 70 to 75 ℃ for 30 minutes, then the disinfection mode will be automatically exited. After starting the manual disinfection function, press and hold the “M” + “ “∧” + “∨” button for 5 seconds or more at the same time to exit the manual disinfection mode. When the water temp. setting value i s ≥75 75℃, the disinfection function is notactivated.

Automatic disinfection mode:
If the water temp. setting value is <75 ℃, the controller operation time reaches 7 days, and the controller enters the automatic disinfection mode. Once the automatic disinfection mode exits, time begins from zero then wait for the next cycle. When the ambient temp. is ≥ 20 20℃, the electric heater is started at 1:00 am to start disinfectiondisinfection; When the ambient temp. is <20 20℃, the electric heater is started at 15:00 pm to start disinf ectionection;  After the automatic disinfection function is activated, the disinfection symbol flashes. At this time, the electric heater is started to heat the water to 75 75℃. And the water temp. is maintained at 70 to 75 75℃ for 30 minutes, then the disinfection mode will be automatically exited. When the water temp. setting value is ≥75 75℃, the disinfection function is not activated.

Malfunctioning of the unit and alarm/ error codes
When an error occurs or the protection mode is set automatically, the circuit board and the wired controller will both display the error message.

1. “02E” hig h exhaust temp. failure: After the compressor starts running for 1 minute when the exhaust gas temp. is detected to be higher than or equal to the exhaust high temp. protection value by 110 ℃ for 10 consecutive seconds, a high exhaust temp. alarm occurs and the compressor stops. At this time, the controller shows high temp. fault alarm code “02E”. When the exhaust temp. drops back to 90 90℃, the alarm is released, and the normal temp. the control function is restored. If high temp. fault protection appears 3 times within half an hour, the controller will lock the protection. And the compressor will be locked in the shutdown protection state. At this time, only the shutdown and restarting can unlock the compressor.

2. ”03E” high-pressure failure: After the compressor is started, if the high-pressure switch is detected to be in the off state for 10 seconds, the compressor immediately stops running. At this time, the controller displays the high-pressure fault alarm code “03E”. If the high-pressure switch is restored, er error code will not occur. If no other protection or locking occurs, the compressor is restarted after 3 minutes.  If high-pressure fault protection appears 3 times within 1 hour, the controller will lock the protection, and the compressor will be locked in the shutdown protection state. At this time, only the shutdown and restarting can unlock the compressor.

3. ”04E 04E” Low-pressure fault: After the compressor runs for 5 minutes if the low low-pressure switch is detected to be in the off state for 10 consecutive seconds, the compressor immediately stops running. At this time, the controller displays the low-pressure fault alarm code “04E”. If the low-pressure switch is restored, an error code does not occur. If no other protection or locking occurs, the compressor is restarted after 3 minutes. If low-pressure fault protection appears 3 times within 1 hour, the controller will lock the protection. The compressor will lock in the shutdown protection state. At this time, only the shutdown and restarting can unlock the compressor. The low-pressure switch is not detected during the defrosting.

4. “09E” communication failure: “09E” is displayed when the communication between the main control board and the wired controller is abnormal or the data line is not connected normally. “ “– :– ” is displayed when the valid clock cannot be obtained. And the communication indicator of the main control board flashes. The buzzer sounds when an alarm occurs. Press any key to silence the alarm.

5. Temp. sensor failure: “11E ”, “12E”, “13E”, “14E”, “15E”, “17E”, “18E”, Check firstly if the sensor failure or connection wire failure; or probably the main board failure. Then replace the failed parts or call the engineer for help.

   • Note: The heat pump will stop once the water tank temp. sensor or outlet water temp. sensor or ambient temp. the sensor is faulty. When absorb or exhaust or evaporator coil or water return temp. the sensor is faulty, electric heater is allowed to operate. When the water tank or ambient temp. the sensor is faulty, electric heating operation is not allowed.

6. Low ambient temp. protection:
   When the ambient temp. is ≤ -9 ℃, the compressor is prohibited from running. When the ambient temp. is ≥ -7°C, normal operation is resumed, and this protection has no fault display.

7. Facto ry Parameters ListList（Type R290 All-in-one heat pump water heater heater）
   These parameters are factory programming. Which can only be checked or adjusted by professional engineers.

F04

| Heating temp. setting range selection 0：15～55； 1：15～75

2：15～60； 3：15～40;

|

0～3

|

/

|

0

| Factory: R134:F04=1; R290:F04=0;
F05| Temp. setting deviation in automatic mode| -10～20| ℃| 0| Factory
F08| Max. water tank temp. limited when only

heat pump

| 30～75| ℃| 60| Factory
F09| HP Lowest working ambient temp.| -15～5| ℃| -7| Factory
F10| Auxiliary E- heater starting ambient temp.| -10～35| ℃| 5| Factory
F11| Water tank temp. Sensor calibration value| -20～20| ℃| 0| Factory
F12| Outlet water temp. Sensor calibration value| -20～20| ℃| 0| Factory
F13| Auto fast heating mode：0＝ON；1＝ Forbidden| 0～1| /| 1| Factory
F14| Auto fast heating temp. difference| 2～70| ℃| 40| Factory
F15| (Between setting temp. and real water

temp.)

| 50～99| ℃| 68| Factory
F16| Warning high temp.| 2～15| ℃| 5| Factory
F20| Defrosting period| 1～90| Min| 40| Factory
F21| Defrost time each time| 6～90| Min| 10| Factory
F22| Defrosting max. ambient temp.| 0～50| ℃| 12| Factory
F23| Defrosting starting coil temp.| -30～30| ℃| -3| factory
F24| Defrosting stopping coil temp.| 0～50| ℃| 18| Factory
F25| Defrosting temp. Difference between

ambient temp. and coil temp.

| 0～15| ℃| 10| factory
F26| Before defrosting, the compressor

continually

| 0～40| Min| 6| factory
F30| Turn off fan motor ambient temp. point| 10～40| ℃| 25| factory
F32| Turn off fan motor exhaust temp. point| 10～125| ℃| 100| Factory
F33| Turn on fan motor exhaust temp. difference| 1～50| ℃| 5| factory
F35| High-speed and low-speed transfer water

tank temp.

| 10～60| ℃| 48| factory
F36| Water tank temp. when turn off fan motor| 15～75| ℃| 52| Factory
F37| Coil temp. when turn off fan motor| 10～30| ℃| 18| Factory
F38| Set value of coil temp. when the fan restart| 0～15| ℃| 7| factory

F40

| Low-pressure switch setting:

0：alarm when switch on；1：alarm when switch off；2：forbidden;

|

0～2

|

/

|

2

| factory
---|---|---|---|---|---
F43| Low voltage fault detection delay| 0～60| Min| 3| Factory

F44

| High-pressure switch setting:

0：alarm when switch on；1：alarm when switch off；2：forbidden。

|

0～2

|

/

|

1

| factory
F45| Low/high voltage faults auto-recovered Max

times

| 0～10| /| 3| factory

F47

| Water flow switch setting：

0：Switch on when water flow is a failure；1：

Switch off      when water flow is a failure；2： Forbidden

|

0～2

|

/

|

2

| Factory
F50| EEV control cycle| 20～90| Sec.| 30| factory
F51| Target superheat (ambient temp. >15℃)| -8～15| ℃| 1| factory
F52| Expansion valve allows exhaust temp.| 70～120| ℃| 92| factory
F53| Defrost expansion valve setting| 20～450| P| 400| Factory
F54| Minimum opening of the expansion valve

(ambient temp. >=5 ° C)

| 80～250| P| 100| Factory
F55| Expansion valve manual/automatic selection

0: automatic; 1: Manual

| 0～1| /| 0| factory
F56| Number of manual steps of expansion valve| 20～450| P| 350| factory
F60| Exhaust high temp. protection value| 50～110| ℃| 100| factory
F61| Water tank temp. compensation type: 0 =

automatic, 1 = cancel.

| 0～1| /| 0| Factory
F62| Cooling/Heating selection mode 0: cooling;

1: heating

| 0～1| /| 1| factory
F63| System working mode 0: manual mode; 1:

automatic mode

| 0～1| /| 0| factory
F66| electric disinfection function 0: disabled; 1:

enable

| 0～1| /| 1| factory
F68| Low-temperature anti-freezing function 0:

disabled; 1: enable

| 0～1| /| 1| Factory
F70| Password for accessing the menu. 0 indicates

cancel password

| 0～999| /| 0| factory
F92| Celsius/Fahrenheit option 0: Celsius; 1:

Fahrenheit (reserved)

| 0～1| /| 0| factory
F93| Enable “ventilation” function: 0: the heat

pump is preferred; 1: ventilation priority

| 0～1| /| 0| Factory

The pilot run of the heat pump

Please confirm the following before pilot run of heat pump

1. The heat pump has been finished well;
2. Assemble pipe and wire are all correct;
3. Drain water is smooth;
4. Insulation materials are complete;
5. The ground wire is installed well;
6. Power voltage is equivalent to the rated voltage of the heat pump;
7. The inlet and outlet airport have no obstacles;
8. Air attached to the water pipe is drained out, and all valves have been opened;
9. Leakage protection device works well;
10. Input water pressure is less than 0.15Mpa;

Maintenance and Solution

Maintenance

1. Frequently check power plugs and sockets and make sure both of them have been connected well and reliably, and have no over-heating effect;
2. When not used for a long time, especially where temp. is below 0 0℃， water filled in the water tank must be drained out to prevent damaging the inner tank; (Operation shown the above contents)
3. To make the heat pump to keep a long-term and high-efficiency working state, we suggest you clean the inner tank up every half a year to remove accumulated sediment, please obey the following rules to clean the inner tank:
4. Turn off the power supply of the heat pump;
5. Turn off the LD water inlet valve, and open up hot water tap water;
6. Connect drainage water with the drain outlet through a soft pipe;( temp. resist of drainage pipe is less than 93 93℃， if the drainage pipe does not meet demands, please turn on the cold water inlet valve, and turn on the hot water tap water until water is not hot);
7. Turn on the drainage water port of the heat pump, and clean the water tank attached to the inner tank up, if needed, you will wash the tank many times to clear sediment;
8. Turn off the drainage water port, re-fill water into the inner tank, and recover the power supply;
9. Each device has been matched with one anode rod, and the anode rod will be slowly consumed during the process of protecting the inner tank and extending its use life. Under some water circumstances, the anode rod and water can rise in reaction, hot water will quickly corrode and rise leakage when the anode rod has been used up. We suggest checking insulation materials every year, if an anode rod is used up, you can inquiry local server center or specific technical department to change a new one;
10. Used for enough hot water where we suggest user turn down set temp.temp., which can reduce heat loss and avoid incrustation, meanwhile this work can help you save more electric energy and extend use life;
11. Filter should be cleaned up every one month to make sure the heating
12. If used for those regions which the temp. is below 0 0℃, you can take suitable measures to protect pipes in case the heat pump is installed outdoors for the purpose of protecting connection pipe and keeping your normal life;

Troubleshooting

This section provides useful information for diagnosing and correcting certain troubles that may occur. Before starting the troubleshooting procedure, carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring.
NOTE: WHEN CARRYING OUT AN INSPECTION ON THE SWITCH BOX OF THE UNIT, ALWAYS MAKE SURE THAT THE MAIN SWITCH OF THE UNIT IS SWITCHED ‘’ OFF’. The guidelines below might help to solve your problem.

properly.
The screen is dark| The temp. the controller is on the lowest temp. control state; The temp. the controller is damaged; The circuit board of the indicator lamp is damaged.| Set the temp. of the controller in higher state. Inform the serviceman.
No water out from the hot| The tap water is cut off;| Waiting for the restoration of the tap water.
water outlet| The water pressure is too low; The tap water inlet valve is closed.| Wait and use when the water pressure is raised. Open the tap water inlet valve.
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Water leakage| Bad tightness in the connecting points between pipes.| Improve the tightness of the connecting points

Environmental Information

• This equipment contains fluorinated greenhouse gases covered by the Kyoto Protocol. It should only be serviced or dismantled by professionally trained personnel.
• This equipment contains R290 refrigerant in the amount stated in the specification. Do not vent R290 into the atmosphere: R290 is a fluorinated greenhouse gas with a Global Warming Potential (GWP) = 20.
• Dismantling of the unit, and treatment of the refrigerant, of oil, and of other parts must be done in accordance with relevant local and national legislation.
• Do not try to dismantle the system yourself: the dismantling of the system, and treatment of the refrigerant, of oil and other parts must be done by a qualified installer in accordance with relevant local and national legislation.
• Units must be treated at a specialized treatment facility for re re-use, recycling, and recovery.
• By ensuring that this product is disposed of correctly, you will help to prevent potential negative consequences for the environment and human health.
• Please contact the installer or local authority for more information.

Wiring Diagram

Please refer to the wiring diagram on the electric box.

Thank you very much for purchasing our product, please keep this installation manual carefully and read this manual carefully before you install all heat pumps.
Model: AH -200NH4GHB200NH4GHB/ AH -300NH4GHB

Dear Customers
Thank you for selecting our products! The manual aims to let you learn more installation, operation, and maintenance of heat pumps and provides some important safe information for you. It’s quite required to carefully read the whole contents s shown in this manual before you install and use the heat pump, and please keep this installation manual carefully for the purpose of future reference.

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