Mitsubishi Electric TAR-41MAA Split System Heat Pump User Manual

Mitsubishi Electric TAR-41MAA Split System Heat Pump

Product Information

Specifications

• Product Name: SPLIT-SYSTEM HEAT PUMP TPKA0A.1LA Series
• Model: TPKA0A.1LA
• Installation Manual Included

Product Usage Instructions

• Safety Precautions:
  Before beginning the installation process, ensure you carefully read and understand all safety precautions outlined in the manual. Pay close attention to warnings and cautions to prevent any harm to yourself or damage to the unit.

• Installation Location:
  Choose a suitable location for installing the unit that meets the specified requirements mentioned in the manual. Ensure proper grounding of necessary parts and avoid installation in areas prone to earthquakes, typhoons, or strong winds.

• Installing the Indoor Unit:
  Follow the step-by-step instructions provided in the manual to correctly install the indoor unit. Use tools and components recommended for use with the specified refrigerant to prevent any leakage or damage.

• Installing the Refrigerant Piping:
  Refer to the manual for detailed instructions on installing the refrigerant piping correctly. Use the specified refrigerant as mentioned in the outdoor unit installation manual to ensure the proper functioning of the unit.

• Drainage Piping Work:
  Ensure proper drainage piping work is carried out as per the guidelines provided. This is crucial for efficient operation and preventing any water leakage issues.

• Electrical Work:
  Follow the electrical work instructions carefully to connect the unit to the power supply system safely. Obtain consent from the supply authority before proceeding with any electrical connections.

• Test Run:
  Once installation is complete, perform a test run as instructed in the manual to ensure the unit operates normally. Explain the operation and maintenance procedures to the customer for future reference.

• Easy Maintenance Function:
  Familiarize yourself with the easy maintenance functions of the unit as outlined in the manual. Regular maintenance will help prolong the lifespan of the product.

FAQ:

• Q: What should I do before connecting the equipment to the power supply system?
  A: Before connecting the equipment, make sure to read and follow all safety precautions provided in the manual. Obtain consent from your supply authority to ensure a safe connection.

For safe and correct use, read this manual and the outdoor unit installation manual thoroughly before installing the air-conditioner unit.

Note:
In this installation manual, the term “Wired remote controller” refers only to the TAR-41MAA and the term “Wireless remote controller” refers only to the PAR-SL101A-E. If you need any information for other remote controllers, refer to the installation manual that is included with the grilled, which includes a remote controller, or the initial setting manual that is included with the optional remote controller.

Safety precautions

• Before installing the unit, make sure you read all the “Safety Precautions”.
• The “Safety Precautions” provide very important points regarding safety. Make sure you follow them.
• Please report to your supply authority or obtain their consent before connecting this equipment to the power supply system.

Symbols used in the text

• Warning:
  Describes precautions that should be observed to prevent danger of injury or death to the user.

• Caution:
  Describes precautions that should be observed to prevent damage to the unit.

Symbols used in the illustrations

• : Indicates a part that must be grounded.
• : Be sure not to do this.

After installation work has been completed, explain the “Safety Precautions,” use, and maintenance of the unit to the customer according to the information in the Operation Manual and perform the test run to ensure normal operation. Both the Installation Manual and Operation Manual must be given to the user for keeping. These manuals must be passed on to subsequent users.

Warning:

• Carefully read the labels affixed to the main unit.
• Ask a dealer or an authorized technician to install, relocate and repair the unit.
• The user should never attempt to repair the unit or transfer it to another location.
• For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe components specifically made for use with refrigerant specified in the outdoor unit installation manual.
• The unit must be installed according to the instructions to minimize the risk of damage from earthquakes, typhoons, or strong winds. An incorrectly installed unit may fall and cause damage or injuries.
• Do not alter the unit. It may cause fire, electric shock, injury or water leakage.
• The unit must be securely installed on a structure that can sustain its weight.
• The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as specified for operation.
• If the air conditioner is installed in a small room or closed room, measures must be taken to prevent the refrigerant concentration in the room from exceeding the safety limit in the event of refrigerant leakage. Should the refrigerant leak and cause the concentration limit to be exceeded, hazards due to lack of oxygen in the room may result.
• Keep gas-burning appliances, electric heaters, and other fire sources (ignition sources) away from the location where installation, repair, and other air conditioner work will be performed.
• If refrigerant comes into contact with a flame, poisonous gases will be released.
• Ventilate the room if the refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.
• All electric work must be performed by a qualified technician according to local regulations and the instructions given in this manual.
• Do not use the intermediate connection of the electric wires.
• Use only specified cables for wiring. The wiring connections must be made securely with no tension applied to the terminal connections. Also, never splice the cables for wiring (unless otherwise indicated in this document). Failure to observe these instructions may result in overheating or a fire.
• When installing or relocating, or servicing the air conditioner, use only the specified refrigerant written on the outdoor unit to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines. If air is mixed with the refrigerant, then it can cause abnormally high pressure in the refrigerant line and may result in an explosion and other hazards.

The use of any refrigerant other than that specified for the system will cause mechanical failure system malfunction or unit breakdown. In the worst case, this could lead to a serious impediment to securing product safety.

• The appliance shall be installed according to national wiring regulations.
• This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
• Children should be supervised to ensure that they do not play with the appliance.
• The terminal block cover panel of the unit must be firmly attached.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons to avoid a hazard.
• Use only authorized accessories by Mitsubishi Electric and ask a dealer or an authorized technician to install them.
• If accessories are incorrectly installed, water leakage, electric shock, or fire may result.
• After installation has been completed, check for refrigerant leaks. If refrigerant leaks into the room and comes into contact with the flame of a heater or portable cooking range, poisonous gases will be released.
• Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
• The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater).
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odour.
• Pipe work shall be protected from physical damage.
• The installation of pipe work shall be kept to a minimum.
• Compliance with national gas regulations shall be observed.
• Keep any required ventilation openings clear of obstruction.
• Do not use low-temperature solder alloy in case of brazing the refrigerant pipes.
• When performing brazing work, be sure to ventilate the room sufficiently. Make sure that there are no hazardous or flammable materials nearby. When performing the work in a closed room, small room, or similar location, make sure that there are no refrigerant leaks before performing the work.
• If refrigerant leaks and accumulates, it may ignite or poisonous gases may be released.
• Exercise caution when using any auxiliary heat source and follow all third-party manufacturer instructions and safety guidelines for installation and usage.
• Any auxiliary heat source connected to this unit via the CN24 connection must have an independent temperature control mechanism. Failure to install and maintain such a temperature control mechanism may void the warranty for this unit.
• Mitsubishi Electric shall not bear any warranty obligation or other liability for any damage or loss in connection with such third-party auxiliary heaters.

Before installation (Environment)

Caution:

• Do not use the unit in an unusual environment. If the air conditioner is installed in areas exposed to steam, volatile oil (including machine oil), or sulfuric gas, and areas exposed to high salt content such as the seaside, the performance can be significantly reduced and the internal parts can be damaged.
• Do not install the unit where combustible gases may leak, be produced, flow, or accumulate. If combustible gas accumulates around the unit, fire or explosion may result.
• Do not keep food, plants, caged pets, artwork, or precision instruments in the direct airflow of the indoor unit or too close to the unit, as these items can be damaged by temperature changes or dripping water.
• When the room humidity exceeds 80% or when the drainpipe is clogged, water may drip from the indoor unit. Do not install the indoor unit where such dripping can cause damage.
• When installing the unit in a hospital or communications office, be prepared for noise and electronic interference. Inverters, home appliances, high-frequency medical equipment, and radio communications equipment can cause the air conditioner to malfunction or break down. The air conditioner may also affect medical equipment, disturbing medical care, and communications equipment, harming the screen display quality.

Before installation or relocation

Caution:

• Be extremely careful when transporting the units. Two or more persons are needed to handle the unit, as it weighs 20 kg, 44 lbs or more. Do not grasp the packaging bands. Wear protective gloves as you can injure your hands on the fins or other parts.
• Be sure to safely dispose of the packaging materials. Packaging materials, such as nails and other metal or wooden parts may cause stabs or other injuries.
• Thermal insulation of the refrigerant pipe is necessary to prevent condensation. If the refrigerant pipe is not properly insulated, condensation will be formed.
• Place thermal insulation on the pipes to prevent condensation. If the drainpipe is installed incorrectly, water leakage and damage to the ceiling, floor, furniture, or other possessions may result.
• Do not clean the air conditioner unit with water. Electric shock may result.
• Tighten all flare nuts to specification using a torque wrench. If tightened too much, the flare nut can break after an extended period.
• If the unit is run for long hours when the air above the ceiling is at high temperature/high humidity (dew point above 26 ºC, 79 ºF), dew condensation may be produced in the indoor unit or the ceiling materials. When operating the units in this condition, add insulation material (10-20 mm, 25/64-25/32 inch) to the entire surface of the unit and ceiling materials to avoid dew condensation.

Before electric work

Caution:

• Be sure to install circuit breakers. If not installed, electric shock may result.
• For the power lines, use standard cables of sufficient capacity. Otherwise, a short circuit, overheating, or fire may result.
• When installing the power lines, do not apply tension to the cables.
• Be sure to ground the unit. If the unit is not properly grounded, electric shock may result.
• Use circuit breakers (ground fault interrupter, isolating switch (+B fuse), and moulded case circuit breaker) with the specified capacity. If the circuit breaker capacity is larger than the specified capacity, breakdown or fire may result.

Before starting the test run

Caution:

• Turn on the main power switch more than 12 hours before starting operation. Starting operation just after turning on the power switch can severely damage the internal parts.
• Before starting operation, check that all panels, guards and other protective parts are correctly installed. Rotating, hot, or high-voltage parts can cause injuries.
• Do not operate the air conditioner without the air filter set in place. If the air filter is not installed, dust may accumulate and breakdown may result.
• Do not touch any switch with wet hands. Electric shock may result.
• Do not touch the refrigerant pipes with bare hands during operation.
• After stopping operation, be sure to wait at least five minutes before turning off the main power switch. Otherwise, water leakage or breakdown may result.

Installation location

Outline dimensions (Indoor unit) (Fig. 2-1, 2-2)
Select a proper position allowing the following clearances for installation and maintenance.

237

9-11/32

| 898

35-23/64

| 299

11-25/32

| Min. 150

Min. 5-29/32

| Min. 50 Min.

1-31/32

| Min. 50 Min.

1-31/32

| Min. 250

Min. 9-27/32

| Min. 260

Min. 10-1/4

• F. Air outlet: Do not place an obstacle within 1500 mm, 59-1/16 inch of the air outlet.
• G. Floor surface
• H. Furnishings
• I. When the projection dimension of a curtain rail or the like from the wall exceeds 60 mm, 2-23/64 inch, extra distance should be taken because the fan air current may create a short cycle.
• J. 1800 mm, 70-55/64 inch or greater from the floor surface (for high location mounting)
• K. 75 mm, 2-61/64 inch, or greater with left, rear left, or lower left piping, and optional drain pump installation. (Use the hook positioned on the lower part of the mount board when the dimension is 55 mm, 2-11/64 inch or greater and less than 75 mm, 2-61/64 inch (Less than 55 mm, 2-11/64 inch: NG). Refer to 3.5. for details.)
• L. 350 mm, 13-25/32 inch or greater with optional drain pump installation
• M. Refer to Fig. 2-2

(mm, inch)

 | I|

With Optional DRAIN PUMP

---|---|---
60 or less

2-23/64 or less

| More than 60

More than 2-23/64

M| Min. 7

Min. 9/32

| Min. 60

Min. 2-23/64

| Min. 250

Min. 9-27/32

Please keep space to make vane to act.

Installing the indoor unit

Check the indoor unit accessories (Fig. 3-1)
The indoor unit should be supplied with the following accessories.

Fix at the back of the unit

2| Tapping screw 4 × 25| 12
3| Felt tape| 3
4| Band| 4
5| Clamp| 1

Installing the wall mounting fixture

Setting the wall mounting fixture and piping positions

• Using the wall mounting fixture, determine the unit’s installation position and the locations of the piping holes to be drilled.

Warning:
Before drilling a hole in the wall, you must consult the building contractor. [Fig. 3-2]

• A Mount board 1
• B Indoor unit
• C Bottom left rear pipe hole (ø75 mm, 2-61/64 inch)
• D Bottom right rear pipe hole (ø75 mm, 2-61/64 inch)
• E Bottom right rear condit cable hole (ø75 mm, 2-61/64 inch)
• F Knockout hole for left rear hole (105 × 300 mm, 3-15/16 × 11-13/16 inch)
• G Bolt hole (4-ø9 mm, 23/64 inch hole)
• H Tapping hole (6-ø4.3 mm, 11/64 inch hole)
• I Hole centre
• J Align the scale with the line.
• K Insert scale.

Drilling the piping hole (Fig. 3-3)

• Use a core drill to make a hole of 75 – 80 mm, 2-61/64 – 3-5/32 inch diameter in the wall in the piping direction, at the position shown in the diagram to the left.
• The hole should incline so that the outside opening is lower than the inside opening.
• Insert a sleeve (with a 75 mm, 2-61/64 inch diameter and purchased locally) through the hole.

Note:
The purpose of the hole’s inclination is to promote drain flow.

Installing the wall mounting fixture

• Since the indoor unit weighs nearly 13 kg, and 29 lbs, the selection of the mounting location requires thorough consideration. If the wall does not seem to be strong enough, reinforce it with boards or beams before installation.
• The mounting fixture must be secured at both ends and at the centre, if possible. Never fix it at a single spot or in any nonsymmetrical way. (If possible, secure the fixture at all the positions marked with a bold arrow.)

Warning:
If possible, secure the fixture at all positions indicated with a bold arrow.

Caution:

• The unit body must be mounted horizontally.
• Fasten at the holes as shown by the arrows.

(Fig. 3-4)

• A Min. 119 mm, 4-11/16 inch (669 mm, 26-11/32 inch or greater with optional drain pump installation)
• B Min. 224 mm, 8-13/16 inch
• C Min. 75 mm, 2-61/64 inch (Use the hook positioned on the lower part of the mount board when the dimension is less than 100 mm, 3-15/16 inch with left, rear left, or lower left piping, and optional drain pump installation. Refer to 3.5. for details.)
• D Fixing screws (4 × 25) 2
• E Level
• F Mount board 1

When embedding pipes into the wall (Fig. 3-5)

• The pipes are on the bottom left.
• When the cooling pipe, drain pipes internal/external connection lines etc are to be embedded into the wall in advance, the extruding pipes etc, may have to be bent and have their length modified to suit the unit.
• Use the marking on the mount board as a reference when adjusting the length of the embedded cooling pipe.
• During construction, give the length of the extruding pipes etc some leeway.
  • A Mount Board 1
  • B Reference marking for flare connection
  • C Through hole
  • D On-site piping

Preparing the indoor unit

• Check beforehand because the preparatory work will differ depending on the existing direction of the piping.
• When bending the piping, bend gradually while maintaining the base of the piping exiting portion. (Abrupt bending will cause misshaping of the piping.)
• Cut off the outlet of the pipe depending on the exiting direction of the piping.

Extraction and processing of the piping and wiring (Fig. 3-6)

1. Connection of indoor/outdoor wiring → See page 9.
2. Wrap the felt tape 3 in the range of the refrigerant piping and drain hose which will be housed within the piping space of the indoor unit.
   • Wrap the felt tape 3 securely from the base for each of the refrigerant piping and the drain hose.
   • Overlap the felt tape 3 at one-half of the tape width.
   • Fasten the end portion of the wrapping with vinyl tape.
   • A Liquid pipe
   • B Gas pipe
   • C Indoor/outdoor connection cable
   • D Drain hose
   • E Felt tape 3
3. Be careful that the drain hose is not raised, and that contact is not made with the indoor unit box body. Do not pull the drain hose forcefully because it might come out.

Rear, right and lower piping (Fig. 3-7)

1. Be careful that the drain hose is not raised, and that contact is not made with the indoor unit box body. Arrange the drain hose at the underside of the piping and wrap it with felt tape 3.

2. Securely wrap the felt tape 3 starting from the base. (Overlap the felt tape at one-half of the tape width.)

   • A. Cut off for right piping.
   • B. Cut off for lower piping.
     Left and left rear piping (Fig. 3-8)

3. Drain hose replacement → See 5. Drainage piping work. Be sure to replace the drain hose and the drain cap for the left and rear piping. Dripping may occur if you forget to install or fail to replace these parts.

   • C. Drain cap
   1. Be careful that the drain hose is not raised, and that contact is not made with the indoor unit box body.
   2. Securely wrap the felt tape 3 starting from the base. (Overlap the felt tape at one-half of the tape width.)
   3. Fasten the end portion of the felt tape 3 with vinyl tape.
   • D. Cut off for left piping.

Mounting the indoor unit

1. Affix the mount board 1 to the wall.

2. Hang the indoor unit on the hook positioned on the upper part of the mount board.
   Rear, right and lower piping (Fig. 3-9)

3. While inserting the refrigerant piping and drain hose into the wall penetration hole (penetration sleeve), hang the top of the indoor unit to the mount board 1.

4. Move the indoor unit to the left and right, and verify that the indoor unit is hung securely.

5. Fasten by pushing the bottom part of the indoor unit onto the mount board 1. (Fig. 3-10)
   Check that the knobs on the bottom of the indoor unit are securely hooked into the mount board 1.

6. After installation, be sure to check that the indoor unit is installed level.

   • A. Mount board 1
   • B. Indoor unit
   • C. Hook
   • D. Square hole

Left and left rear piping (Fig. 3-11)

1. While inserting the drain hose into the wall penetration hole (penetration sleeve), hang the top of the indoor unit to mount board 1. Cut part of the shipping box and wrap into a cylindrical form as illustrated in the diagram. Hook this to the rear surface rib as a spacer, and raise the indoor unit.

2. Connect the refrigerant piping with the site-side refrigerant piping.

3. Fasten by pushing the bottom part of the indoor unit onto the mount board 1.
   Check that the knobs on the bottom of the indoor unit are securely hooked into the mount board 1.

4. After installation, be sure to check that the indoor unit is installed level.

   • A. Indoor unit
   • B. Shipping box
   • C. Spacer (Cut out a piece of cardboard from the shipping box.)

Note:

• When the indoor unit cannot be hung and lifted up with the regular hook (the dimension of 2.1. K (the clearance between the ceiling and the unit) is 75 mm, 2-61/64 inch or less), hang the unit on the lower hook for left piping. (Fig. 3-12)
• The lower hook is temporary only for installation. When the installation is done, be sure to hang the indoor unit on the regular hook. The indoor unit cannot be operated while it is hung on the lower hook.

(Fig. 3-12)

• A. Regular hook
• B. Lower hook for left piping
• C. Spacer
• D. Fixing screw 2

When using the lower hook, be sure to screw on the base of the lower hook with a fixing screw 2, otherwise the indoor unit will fall.

Installing the refrigerant piping

Precautions
For devices that use R410A refrigerant

• Use alkylbenzene oil (small amount) as the refrigeration oil applied to the flared sections.
• Use C1220 copper phosphorus for copper and copper alloy seamless pipes, to connect the refrigerant pipes. Use refrigerant pipes with the thicknesses specified in the table below. Make sure the insides of the pipes are clean and do not contain any harmful contaminants such as sulfuric compounds, oxidants, debris, or dust.

Warning:
When installing or relocating, or servicing the air conditioner, use only the specified refrigerant written on the outdoor unit to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines. If air is mixed with the refrigerant, then it can cause of abnormally high pressure in the refrigerant line and may result in an explosion and other hazards. The use of any refrigerant other than that specified for the system will cause mechanical failure system malfunction or unit breakdown. In the worst case, this could lead to a serious impediment to securing product safety.

ø6.35 mm, 1/4 inch thickness

0.8 mm, 1/32 inch

| ø9.52 mm, 3/8 inch thickness

0.8 mm, 1/32 inch

---|---
ø12.7 mm, 1/2 inch thickness

0.8 mm, 1/32 inch

| ø15.88 mm, 5/8 inch thickness

1.0 mm, 3/64 inch

Do not use pipes thinner than those specified above.

Connecting pipes (Fig. 4-1)

• When commercially available copper pipes are used, wrap liquid and gas pipes with commercially available insulation materials (heat-resistant to 100 °C, 212 °F or more, thickness of 12 mm, 1/2 inch or more).
• The indoor parts of the drain pipe should be wrapped with polyethylene foam insulation materials (specific gravity of 0.03, thickness of 9 mm, 23/64 inch or more).
• Flare the ends of the refrigerant pipes. A
  • A. Flare-cutting dimensions****
    Copper pipe O.D. (mm, inch)| Flare dimensions øA

dimensions (mm, inch)

---|---
ø6.35, 1/4”| 8.7 – 9.1, 11/32 – 23/64
ø12.7, 1/2”| 16.2 – 16.6, 41/64 – 21/32

Copper pipe O.D. (mm, inch)

| B (mm, inch)
---|---
Flare tool for R410A
Clutch type
ø6.35, 1/4”| 0 – 0.5, 0 – 1/64
ø12.7, 1/2”| 0 – 0.5, 0 – 1/64

• Apply refrigerating machine oil over the entire flare seat surface. B
• Use the flare nuts as follows. C
• For connection, first, align the centre, then tighten the first 3 to 4 turns of the flare nut by hand.
• Use 2 wrenches to tighten piping connections. D
• Use refrigerant piping insulation provided to insulate indoor unit connections. Insulate carefully.
• After connecting the refrigerant piping to the indoor unit, be sure to test the pipe connections for gas leakage with nitrogen gas. (Check that there is no refrigerant leakage from the refrigerant piping to the indoor unit.)
• Use flared nut installed to this indoor unit.
• In case of reconnecting the refrigerant pipes after detaching, make the flared part of the pipe re-fabricated.

D. Flare nut tightening torque

Copper pipe O.D.

(mm, inch)

| Flare nut O.D.

(mm, inch)

| Tightening torque

(N·m, ft·lbs)

---|---|---
ø6.35, 1/4| 17, 43/64| 14 – 18, 10 – 13
ø12.7, 1/2| 28, 1-7/64| 49 – 61, 35 – 44

Warning:

• Be careful of flying flare nut! (Internally pressurized)
  Remove the flare nut as follows:

  1. Loosen the nut until you hear a hissing noise.
  2. Do not remove the nut until the gas has been completely released (i.e., hissing noise stops).
  3. Check that the gas has been completely released, and then remove the nut.

• When installing the unit, securely connect the refrigerant pipes before starting the compressor.

Positioning refrigerant and drain piping (Fig. 4-3)

• A. Gas pipe * Indicates the condition with accessories mounted.
• B. Liquid pipe
• C. Drain hose (Effective length: 500 mm, 19-11/16 inch)
• D. Left-side piping knockout hole
• E. Right-side piping knockout hole
• F. Lower piping knockout hole
• G. Mount board 1

Refrigerant piping (Fig. 4-4)

Indoor unit

1. Remove the flare nut and cap of the indoor unit.
2. Make a flare for the liquid pipe and gas pipe and apply refrigerating machine oil (available from your local supplier) to the flare sheet surface.
3. Quickly connect the on-site cooling pipes to the unit.
4. Wrap the pipe cover that is attached to the gas pipe and make sure that the connection joint is not visible.
5. Wrap the pipe cover of the unit’s liquid pipe and make sure that it covers the insulation material of the on-site liquid pipe.
6. The portion where the insulation material is joined is sealed by taping.
   • A. Site-side refrigerant piping
   • B. Unit-side refrigerant piping

Storing in the piping space of the unit (Fig. 4-5)

1. Wrap the supplied felt tape in the range of the refrigerant piping which will be housed within the piping space of the unit to prevent dripping.
2. Overlap the felt tape at one-half of the tape width.
3. Fasten the end portion of the wrapping with vinyl tape, etc.
   • A. Gas pipe
   • B Liquid pipe
   • C Indoor/outdoor connection cable
   • D Felt tape 3

Drainage piping work

• Drainage piping work (Fig. 5-1)
  • Drain pipes should have an inclination of 1/100 or more.
  • For extension of the drain pipe, use a soft hose (inner dia. 15 mm, 19/32
  inch) available on the market or hard vinyl chloride pipe (VP-16/O.D. ø22 mm,
  55/64 inch PVC TUBE). Make sure that there is no water leakage from the
  connections.
  • Do not put the drain piping directly in a drainage ditch where sulphuric gas may
  be generated.
  • When piping has been completed, check that water flows from the end of the
  drain pipe.

Caution:
The drain pipe should be installed according to this Installation Manual to ensure correct drainage. Thermal insulation of the drain pipes is necessary to prevent condensation. If the drain pipes are not properly installed and insulated, condensation may drip on the ceiling, floor or other possessions.

• A. Inclined downwards
• B Must be lower than the outlet point
• C Water leakage
• D Trapped drainage
• E Air
• F Wavy
• G The end of the drain pipe is under water.
• H Drainage ditch
• I 5 cm, 1-31/32 inch or less between the end of the drain pipe and the ground.
• J Drain hose
• K Soft PVC hose (Inside diameter 15 mm, 19/32 inch) or Hard PVC pipe (VP-16)
  • Bond with PVC-type adhesive

Preparing left and left rear piping (Fig. 5-2)

1. Remove the drain cap.
   • Remove the drain cap by holding the bit that sticks out at the end of the pipe and pulling.
   • A Drain cap
2. Remove the drain hose.
   • Remove the drain hose by holding on to the base of the hose a (shown by arrow) and pulling towards yourself b.
3. Insert the drain cap.
   • Insert a screwdriver etc into the hole at the end of the pipe and be sure to push to the base of the drain cap.
4. Insert the drain hose.
   • Push the drain hose until it is at the base of the drain box connection outlet.
   • Please make sure the drain hose hook is fastened properly over the extruding drain box connection outlet.
   • B Hooks

Storing in the piping space of the indoor unit (Fig. 5-3)

• When the drain hose will be routed indoors, be sure to wrap it with commercially available insulation.
• Gather the drain hose and the refrigerant piping together and wrap them with the supplied felt tape 3.
• Overlap the felt tape 3 at one-half of the tape width.
• Fasten the end portion of the wrapping with vinyl tape, etc.
  • A. Gas pipe
  • B Liquid pipe
  • C Drain hose
  • D Indoor/outdoor connection wiring
  • E Felt tape 3

Check of drainage (Fig. 5-4)

• Open the front grille and remove the filter.
• Facing the fins of the heat exchanger, slowly fill with water.
• After the drainage check, attach the filter and close the grille.

Electrical work

Electric wiring [Fig. 6-1]
The connection can be made without removing the front panel.

1. Open the front grille, remove the screw (2 pieces), and remove the electrical box cover.
   • Electrical work can be conducted more effectively with the panel removed. When attaching the panel, check that the hooks K at three locations on the air outlet side are connected securely.
2. Securely connect each wire to the terminal block.
   • In consideration of servicing, provide extra length for each of the wires.
   • Take care when using strand wires, because beards may cause the wiring to short out.
3. Install the parts that were removed back to their original condition.
4. When going through the right side of the indoor unit, cut out the removable section of the Corner box E.
   • A. Front grille
   • B Fixing screw
   • C Electrical box cover
   • D Fixing screw
   • E Corner box
   • F Conduit plate
   • G Conduit cover
   • H Fixing screw
   • I Fixing screw
   • J Remote control cable
   • K Indoor-outdoor connection cable
   • L Ground wire
   • M Lock nut
   • N Conduit joint
   • O Conduit pipe
   • P Ground wire connection portion
   • Q MA remote control terminal block: (1, 2) do not have polarity
   • R Terminal block for indoor and outdoor units connection: S1, S2 and S3, have polarity
   • S Hook

Caution:
Wiring for the remote controller cable shall be apart (5 cm, 1-31/32 inches or more) from the power source wiring so that it is not influenced by electric noise from the power source wiring.

When wiring two indoor-outdoor connection cables

• If the cables have the same diameter, insert them into the cut outs on both sides.
• If the cables have different diameters, insert them on one side into separate spaces with one cable positioned above the other.

WARNING

• Connecting two wires on one side is prohibited.
• Connecting three wires or more to the same terminal is prohibited.
• Connecting wires with different diameters is prohibited.

When using a single cable, a round crimped terminal or other terminal work is prohibited.

Indoor unit power is supplied from the outdoor unit

• The following connection patterns are available.
• The outdoor unit power supply patterns vary on models.

System

• A. Outdoor unit power supply
• B Wiring circuit breaker or isolating switch
• C Outdoor unit
• D Indoor unit/outdoor unit connecting cords
• E Wired remote controller
• F Indoor unit
• G Indoor unit earth
• H Indoor controller board
• I Radio frequency interface for RF thermostat Only for 1:1 System

• A. Outdoor unit power supply
• B Earth leakage breaker
• C Wiring circuit breaker or isolating switch
• D Outdoor unit
• E Indoor unit/outdoor unit connecting cables
• F Remote controller
• G Indoor unit

• Affix a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
• The applied earth type depends on the outdoor unit.
• Please refer to the connected outdoor unit Installation Manual.

Simultaneous twin system

Only for wired remote controller.

• A. Outdoor unit power supply
• B Wiring circuit breaker or isolating switch
• C Outdoor unit
• D Indoor unit/outdoor unit connecting cords
• E Wired remote controller
• F Indoor unit
• G Indoor unit earth

Affix a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.

Wiring Wire No.

× size

| Indoor unit-Outdoor unit| 1| 3 × AWG14 (Polar)
Indoor unit earth| 1 × Min. AWG14
Wired remote controller-Indoor unit| 2| 2 × Min. AWG22 (Non-polar, unshielded)

Circuit rating

| Indoor unit-Outdoor unit S1-S2| 3| 208/230 V AC
Indoor unit-Outdoor unit S2-S3| 3 4| 24 V DC / 28 V DC
Wired remote controller-Indoor unit| 3| 12 V DC

1. <For 12-36 outdoor unit applications>

   • Max. 45 m, 148 ft
   • If AWG13 (2.5 mm2) is used, Max. 50 m, 165 ft
   • If AWG13 (2.5 mm2) is used and S3 is separated, Max. 80 m, 263 ft

2. Max. 500 m, 1640 ft
   (When using 2 remote controllers, the maximum wiring length for the remote controller cables is 200 m, 656 ft.)

3. The figures are NOT always against the ground.
   S3 terminal has 24 V DC / 28 V DC against the S2 terminal. However, between S3 and S1, these terminals are not electrically insulated by the transformer or other device.

4. It depends on the outdoor unit.

Notes:

1. Wiring size must comply with the applicable local and national codes.
2. Power supply cords and indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene-sheathed flexible cords. (Design 60245 IEC 57)
3. Use copper supply wires.
4. Use UL wires rated 300 V or more for the power supply cords and the indoor unit/outdoor unit connecting cords.
5. Install an earth longer than other cords.
6. Indoor and outdoor connecting wires have polarities. Make sure to match the terminal number (S1, S2, S3) for correct wirings.
7. Wiring for the remote controller cable shall be apart (5 cm, 2 inches or more) from the power source wiring so that it is not influenced by electric noise from the power source wiring.
8. This appliance incorporates an earth connection for functional purposes only.

Warning:
Never splice the power cable or the indoor-outdoor connection cable, otherwise, it may result in smoke, a fire or communication failure.

Function settings

By wired remote controller

1. (Fig. 6-4)

   • Select “Service” from the Main menu, and press the [SELECT/HOLD] button.
   • Select “Settings” from the Service menu, and press the [SELECT/HOLD] button.

2. (Fig. 6-5)
   Select “Function settings” with the [SELECT/HOLD] button.

3. (Fig. 6-6)
   Set the indoor unit refrigerant addresses and unit numbers with the [F1] through [F4] buttons, and then press the [SELECT/HOLD] button to confirm the current setting.
   < Checking the Indoor Unit No.>
   When the [SELECT/HOLD] button is pressed, the target indoor unit will start fan operation. If the unit is common or when running all units, all indoor units for the selected refrigerant address will start fan operation.

4. (Fig. 6-7)
   When data collection from the indoor units is completed, the current settings appear highlighted. Non-highlighted items indicate that no function settings are made. Screen appearance varies depending on the “Unit No.” setting.

5. (Fig. 6-8)
   Use the [F1] or [F2] button to move the cursor to select the mode number, and change the setting number with the [F3] or [F4] button.

6. (Fig. 6-9)

   • When the settings are completed, press the [SELECT/HOLD] button to send the setting data from the remote controller to the indoor units.
   • When the transmission is completed, the screen will return to the Function setting screen.

Function table
Select unit number “Grp.”

Available 1| 2|  2|
Indoor temperature detecting| Indoor unit operating average|

02

| 1|  |
Set by the indoor unit’s remote controller| 2|  |
Remote controller’s internal sensor| 3|  |
LOSSNAY connectivity| Not Supported|

03

| 1|  |
Supported (indoor unit is not equipped with outdoor air intake)| 2|  |
Supported (indoor unit is equipped with outdoor air intake)| 3|  |
Power voltage| 230 V| 04| 1|  |
208 V| 2|  |

Select unit numbers 1 to 4 or “All”

07

| 1|  |
2500 Hr| 2|  |
No filter sign indicator| 3|  |
Fan speed| Silent|

08

| 1|  |
Standard| 2|  |
High ceiling| 3|  |
Fan speed during the cooling thermostat is OFF| Setting fan speed|

27

| 1|  |
Stop| 2|  |
Extra low| 3|  |

1. When the power supply returns, the air conditioner will start 3 minutes later.
2. Power failure automatic recovery initial setting depends on the connecting outdoor unit.

CN24 settings (Mass save settings)

• Heat Pump auto ON/OFF setting depends on Outdoor temperature

• Heater via CN24 auto ON/OFF setting depends on Outdoor temperature or the difference between setting temp. and indoor ambient temperature.

• (Fig.6-10)

  • Select “Service” from the Main menu, and press the [SELECT/HOLD] button.
  • Select “Settings” with the [F1] or [F2] button, and press the [SELECT/HOLD] button.

• (Fig.6-11)

  • Select “CN24 settings” with the [F1] or [F2] button, and press the [SELECT/ HOLD] button.

• (Fig.6-12)

  • Set the indoor unit refrigerant address with the [F1] or [F2] button, then press the [SELECT/HOLD] button.

• (Fig.6-13, 6-14)

  • Select “Limit settings” or “CN24 ON condition” with the [F1] or [F2] button and press the [SELECT/HOLD] button.

• (Fig.6-16, 6-18)

  • Set T(difference between ambient temp. and setting temp.) with the [F3] or [F4] button and press the [SELECT/HOLD] button.

• (Fig.6-15, 6-17)

  • Set UB, UA, LB, LA with the [F3] or [F4] button and press the [SELECT/HOLD] button.

Connected outdoor unit

| UB| UA| LB| LA
---|---|---|---|---
Setting range| Default| Setting range| Default| Setting range| Default| Setting range| Default
TRUZA| 32°F ~ 70°F| 47°F| 23°F ~ 61°F| 38°F| -27°F ~ 52°F| –| -36°F ~ 43°F| –
TRUZH| 32°F ~ 70°F| 47°F| 23°F ~ 61°F| 38°F| -27°F ~ 52°F| –| -36°F ~ 43°F| –
NTXSKS09/12/15/18/24/30/36A112BA| 32°F ~ 70°F| 47°F| 23°F ~ 61°F| 38°F| 14°F ~ 52°F| –| 5°F ~ 43°F| –
NTXSKH09/12/15/18/24/30/36A112AA| 32°F ~ 70°F| 47°F| 23°F ~ 61°F| 38°F| 14°F ~ 52°F| –| 5°F ~ 43°F| –
NTXMMX/NTXMPH| 32°F ~ 70°F| 47°F| 23°F ~ 61°F| 38°F| 14°F ~ 52°F| –| 5°F ~ 43°F| –

If outdoor unit not listed above table, please refer to outdoor IM for details.

Rotation setting
You can set these functions by wired remote controller. (Maintenance monitor)

1. Select “Service” from the Main menu, and press the [SELECT/HOLD] button.

2. Select “Settings” with the [F1] or [F2] button, and press the [SELECT/HOLD] button.

3. Select “Rotation setting” with the [F1] or [F2] button, and press the [SELECT/HOLD] button.

4. Set the rotation function.

   • Select “Rotation” with the [F1] button.

   • Select the switching period or “Backup only” with the [F2] or [F3] button.

   • “Rotation” setup options
     None, 1 day, 3 days, 5 days, 7 days, 14 days, 28 days, Backup only
     Notes:

   • When 1 to 28 days are selected from the setup options, the backup function is also enabled.

   • When “Backup only” is selected, the rotation function will be disabled. The systems with refrigerant addresses of 00 or 01 (00 system/ 01 system) will be operated as a main system while the 02 system is the standby mode as backup.

5. Set the support function.

   • Select “TempDifTrigger” with the [F1] button.

   • Select the difference between the suction temperature and the set temperature with the [F2] or [F3] button.

   • “TempDifTrigger” setup options
     None, +4ºC, +6ºC, +8ºC
     Notes:

   • The support function is available only in the COOL mode. (Not available in the HEAT, DRY and AUTO mode.)

   • The support function is enabled when any option other than “None” is selected from the “Rotation” setup options.

6. Press the [SELECT/HOLD] button to update the setting.
   Reset method

   • Press the [F4] button in step 4 or 5 to reset the operation time of the rotation function. Once it is reset, the operation will start from the systems with refrigerant addresses of 00 or 01.
   • Note: When the system with refrigerant address 02 is in the backup operation, the 00 or 01 systems will be operated again.

Test run

Before test run

• After completing the installation and the wiring and piping of the indoor and outdoor units, check for refrigerant leakage, looseness in the power supply or control wiring, wrong polarity, and no disconnection of one phase in the supply.
• Use a 500-volt megohmmeter to check that the resistance between the power supply terminals and the ground is at least 1.0 MΩ.
• Do not carry out this test on the control wiring (low voltage circuit) terminals.

Warning:
Do not use the air conditioner if the insulation resistance is less than 1.0 MΩ.

Test run

Using the wired remote controller

• Make sure to read the operation manual before the test run. (Especially items to secure safety)

Step 1 Turn on the power.

• Remote controller: The system will go into startup mode, and the remote controller power lamp (green) and “Please Wait” will blink. While the lamp and message are blinking, the remote controller cannot be operated. Wait until “Please Wait” is not displayed before operating the remote controller. After the power is turned on, “Please Wait” will be displayed for approximately 3 minutes.
• Indoor controller board: LED 1 will be lit up, LED 2 will be lit up (if the address is 0) or off (if the address is not 0), and LED 3 will blink.
• Outdoor controller board: LED 1 (green) and LED 2 (red) will be lit up. (After the startup mode of the system finishes, LED 2 will be turned off.) If the outdoor controller board uses a digital display, [- ] and [ -] will be displayed alternately every second.

If the operations do not function correctly after the procedures in step 2 and thereafter are performed, the following causes should be considered and eliminated if they are found. (The symptoms below occur during the test run mode. “Startup” in the table means the LED display written above.)

Symptoms in test-run mode|

Cause

---|---
Remote Controller Display| OUTDOOR BOARD LED Display

The remote controller displays “Please Wait”, and cannot be operated.| After “startup” is displayed, only green lights up.

| •   After power is turned on, “Please Wait” is displayed for 3 minutes during system startup. (Normal)
After power is turned on, “Please Wait” is displayed for 3 minutes, and then the error code is displayed.| After “startup” is displayed, green (once) and red (once) blink alternately. | •   Incorrect connection of outdoor terminal block (L1, L2, GR and S1, S2, S3.)
After “startup” is displayed, green (once) and red (twice) blink alternately. <F3, F5, F9>| •   Outdoor unit’s protection device connector is open.

No display appears even when the remote controller operation switch is turned on. (The operation lamp does not light up.)

| After “startup” is displayed, green (twice) and red (once) blink alternately. <EA. Eb>| •   Incorrect wiring between the indoor and outdoor unit (Polarity is wrong for S1, S2, S3.)

•   Remote controller transmission wire short.

After “startup” is displayed, only green lights up.

| •   There is no outdoor unit of address 0. (Address is other than 0.)

•   Remote controller transmission wire open.

The display appears but soon disappears even when the remote controller is operated.| After “startup” is displayed, only green lights up.

| •   After cancelling function selection, the operation is not possible for about 30 seconds. (Normal)

Step 2 Switch the remote controller to “Test run”.

1. Select “Test run” from the Service menu, and press the [SELECT/HOLD] button. (Fig. 7-1)
2. Select “Test run” from the Test run menu, and press the [SELECT/HOLD] button. (Fig. 7-2)
3. The test run operation starts, and the Test run operation screen is displayed.

Step 3 Perform the test run and check the airflow temperature and auto vane.

1. Press the [F1] button to change the operation mode. (Fig. 7-3)
   • Cooling mode: Check that cool air blows from the unit.
   • Heating mode: Check that warm air blows from the unit.
2. Press the [SELECT/HOLD] button to display the Vane operation screen, and then press the [F1] and [F2] buttons to check the auto vane. (Fig. 7-4) Press the [RETURN] button to return to the Test run operation screen.

Step 4 Confirm the operation of the outdoor unit fan.
The speed of the outdoor unit fan is controlled to control the performance of the unit. Depending on the ambient air, the fan will rotate at a slow speed and will keep rotating at that speed unless the performance is insuffi cient. Therefore, the outdoor wind may cause the fan to stop rotating or to rotate in the opposite direction, but this is not a problem.

Step 5 Stop the test run.

Press the [ON/OFF] button to stop the test run. (The Test run menu will appear.)

Note:
If an error is displayed on the remote controller, see the table below.

LCD| Description of malfunction| LCD| Description of malfunction| LCD| Description of malfunction
---|---|---|---|---|---
P1| Intake sensor error| P9| Pipe sensor error (dual-wall pipe)|

E0 – E5

|

Communication error between the remote controller and the indoor unit

P2| Pipe sensor error (liquid pipe)| PA| Leakage error (refrigerant system)
P4| Drain float switch connector disconnected

(CN4F)

| Pb| Indoor unit fan motor error
PL| Refrigerant circuit abnormal
P5| Drain overflow protection operation| FB| Indoor controller board error|

E6 – EF

|

Communication error between the indoor unit and the outdoor unit

P6| Freezing/overheating protection operation| U, F

(* indicates an alphanumeric character excluding FB.)

|

Outdoor unit malfunction

Refer to the wiring diagram for the outdoor unit.

P8

|

Pipe temperature error

See the table below for the details of the LED display (LED 1, 2, and 3) on the indoor controller board.

LED 1 (microcomputer power supply)| Indicates whether control power is supplied. Make sure that this LED is always lit.
---|---
LED 2 (remote controller power supply)| Indicates whether power is supplied to the wired remote controller. The LED is lit only for the indoor unit that is con- nected to the outdoor unit that has an address of 0.
LED 3 (indoor/outdoor unit communication)| Indicates whether the indoor and outdoor units are communicating. Make sure that this LED is always blinking.

Using the wireless remote controller

Test run (Fig. 7-5)

1. Press the button 1 to stop the air conditioner.
   • If the weekly timer is enabled ( is on), press the button 3 to disable it ( is off).
2. Press the button 2 for 5 seconds.
   • comes on and the unit enters the service mode.
3. Press the button 2.
   • B. comes on and the unit enters the test run mode.
4. Press the following buttons to start the test run.
   • : Switch the operation mode between cooling and heating and start the test run.
   • : Switch the fan speed and start the test run.
   • : Switch the airflow direction and start the test run.
   • : Switch the Louvre and start the test run.
   • : Start the test run.
5. Stop the test run.
   • Press the button 1 to stop the test run.
   • After 2 hours, the stop signal is transmitted.

Self-check (Fig. 7-6)

1. Press the button 1 to stop the air conditioner.
   • If the weekly timer is enabled ( is on), press the button 3 to disable it ( is off).
2. Press the button 2 for 5 seconds.
   • A. comes on and the unit enters the self-check mode.
3. Press button 5 to select the refrigerant address (M-NET address) B of the indoor unit for which you want to perform the self-check.
4. Press the button 4.
   • If an error is detected, the check code is indicated by the number of beeps from the indoor unit and the number of blinks of the OPERATION INDICATOR lamp.
5. Press the button 1.
   • A. and the refrigerant address (M-NET address) B go off and the self-check is completed.

Self-check
Refer to the installation manual that comes with each remote controller for details.

• Refer to the following tables for details on the check codes. (Wireless remote controller)

[Output pattern A]

[Output pattern B]

[Output pattern A] Errors detected by the indoor unit

Wireless remote controller| Wired remote

controller

|

Symptom

|

Remark

---|---|---|---
Beeper sounds/OPERATION

INDICATOR lamp blinks (Number of times)

|

Check code

1| P1| Intake sensor error|
2| P2| Pipe (TH2) sensor error
P9| Pipe (TH5) sensor error
3| E6, E7| Indoor/outdoor unit communication error
4| P4| Drain sensor error/Float switch connector open
5| P5| Drain pump error
PA| Forced compressor error
6| P6| Freezing/Overheating protection operation
7| EE| Communication error between indoor and outdoor units
8| P8| Pipe temperature error
9| E4| Remote controller signal receiving error
10| —| —
11| Pb| Indoor unit fan motor error
12| Fb| Indoor unit control system error (memory error, etc.)
14| PL| Refrigerant circuit abnormal
No sound| E0, E3| Remote controller transmission error
No sound| E1, E2| Remote controller control board error
No sound| – – – –| No corresponding

1. If the beeper does not sound again after the initial 2 beeps to confirm the self-check start signal was received and the OPERATION INDICATOR lamp does not come on, there are no error records.
2. If the beeper sounds 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial 2 beeps to confirm the self-check start signal was received, the specified refrigerant address is incorrect.

• On the wireless remote controller
  The continuous buzzer sounds from the receiving section of the indoor unit. Blink of the operation lamp

• On the wired remote controller
  Check the code displayed on the LCD.

[Output pattern B] Errors detected by units other than indoor units (outdoor units, etc.)

Wireless remote controller| Wired remote

controller

|

Symptom

|

Remark

---|---|---|---
Beeper sounds/OPERATION

INDICATOR lamp blinks (Number of times)

|

Check code

1| E9| Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)|

For details, check the LED display of the outdoor controller board.

2| UP| Compressor overcurrent interruption
3| U3, U4| Open/short of outdoor unit thermistors
4| UF| Compressor overcurrent interruption (When compressor locked)
5| U2| Abnormal high discharging temperature/49C worked/insufficient refrigerant
6| U1, Ud| Abnormal high pressure (63H worked)/Overheating protection operation
7| U5| Abnormal temperature of heat sink
8| U8| Outdoor unit fan protection stop
9| U6| Compressor overcurrent interruption/Abnormal of power module
10| U7| Abnormality of super heat due to low discharge temperature
11| U9, UH| Abnormality such as overvoltage or voltage shortage and abnormal synchro-

nous signal to main circuit/Current sensor error

12| —| —
13| —| —
14| Others| Other errors (Refer to the technical manual for the outdoor unit.)

1. If the beeper does not sound again after the initial 2 beeps to confirm the self-check start signal was received and the OPERATION INDICATOR lamp does not come on, there are no error records.
2. If the beeper sounds 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial 2 beeps to confirm the self-check start signal was received, the specified refrigerant address is incorrect.

• On the wireless remote controller
  The continuous buzzer sounds from the receiving section of the indoor unit. Blink of the operation lamp

• On the wired remote controller Check the code displayed on the LCD.

If the unit cannot be operated properly after the test run, refer to the following table to find the cause.

Please Wait

| For about 3 minutes after power-on| After LED 1, 2 are lit, LED 2 is turned

off, then only LED 1 is lighted. (Correct

operation)

| • For about 3 minutes after power-on, operation of the remote controller is not possible due to system start-up. (Correct

operation)

Please Wait → Error code

| After about 3 minutes after power-on|

Only LED 1 is lighted. → LED 1, 2 blink.

| • The connector for the outdoor unit’s protection device is not connected.

Reverse or open-phase wiring for the outdoor unit’s power

terminal block (L1, L2, GR)

Display messages do not appear even when the operation switch is turned ON (the operation lamp does

not light up).

|

Only LED 1 is lighted. → LED 1 blinks twice, and LED 2 blinks once.

| • Incorrect wiring between indoor and outdoor units (incorrect polarity of S1, S2, S3)

• Remote controller wire short

On the wireless remote controller with the condition above, the following phenomena take place.

• No signals from the remote controller are accepted.
• The operation lamp is blinking.
• The buzzer makes a short ping sound.

Note:
Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)

For a description of each LED (LED 1, 2, 3) provided on the indoor controller.

Easy maintenance function

Maintenance data, such as the indoor/outdoor unit’s heat exchanger temperature and compressor operation current can be displayed with “Smooth maintenance”.

1. This cannot be executed during test operation.
2. Depending on the combination with the outdoor unit, this may not be supported by some models.

• Select “Service” from the Main menu, and press the [SELECT/HOLD] button.
• Select “Check” with the [F1] or [F2] button, and press the [SELECT/HOLD] button.
• Select “Smooth maintenance” with the [F1] or [F2] button, and press the [SELECT/HOLD] button.

Select each item.

• Select the item to be changed with the [F1] or [F2] button.
• Select the required setting with the [F3] or [F4] button.
  • “Ref. address” setting ………. “0” – “15”
  • “Stable mode” setting……….. “Cool” / “Heat” / “Normal”
• Press the [SELECT/HOLD] button, fixed operation will start.
  • Stable mode will take approx. 20 minutes.

The operation data will appear.
The Compressor-Accumulated operating (COMP. run) time is a 10-hour unit, and the Compressor-Number of operation times (COMP. On/Off) is a 100-time unit (fractions discarded)

Navigating through the screens

• To go back to the Service menu…………….[MENU] button
• To return to the previous screen ………. [RETURN] button

This product is designed and intended for use in the residential, commercial and light-industrial environments. Please be sure to put the contact address/telephone number on this manual before handing it to the customer.

MITSUBISHI ELECTRIC TRANE HVAC US LLC
HEAD OFFICE: 1340 SATELLITE BOULEVARD, SUWANEE, GA 30024, USA.

Printed in Thailand.

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