MITSUBISHI ELECTRIC MSY-GR10VF Split-Type Air Conditioners Instruction Manual

MITSUBISHI ELECTRIC MSY-GR10VF Split-Type Air Conditioners

SAFETY PRECAUTIONS

Meanings of symbols displayed on indoor unit and/or outdoor unit

• Since rotating parts and parts which could cause an electric shock are used in this product, be sure to read these “Safety Precautions” before use.
• Since the cautionary items shown here are important for safety, be sure to observe them.
• After reading this manual, keep it together with the installation manual in a handy place for easy reference.
• Be sure to receive a guarantee card from your dealer and check that the purchased date and shop name, etc. are entered correctly.

Marks and their meanings

WARNING: Incorrect handling could cause serious hazard, such as death, serious injury, etc. with a high probability.
CAUTION: Incorrect handling could cause serious hazard depending on the conditions.

Meanings of symbols used in this manual

• : Be sure not to do.
• : Be sure to follow the instruction.
• : Never insert your fi nger or stick, etc.
• : Never step onto the indoor/outdoor unit and do not put anything on them. : Danger of electric shock. Be careful.
• : Be sure to disconnect the power supply plug from the power outlet. : Be sure to shut off the power.
• : Risk of fi re

  WARNING

| Do not connect the power cord to an intermediate point, use an extension cord, or connect multiple devices to a single AC outlet.

•   This may cause overheating, fire, or electric shock.

Make sure the power plug is free of dirt and insert it se- curely into the outlet.

•   A dirty plug may cause fire or electric shock.

Do not bundle, pull, damage, or modify the power cord, and do not apply heat or place heavy objects on it.

•   This may cause fire or electric shock.

Do not turn the breaker OFF/ON or disconnect/connect the power plug during operation.

•   This may create sparks, which can cause fire.

•   After the indoor unit is switched OFF with the remote controller, make sure to turn the breaker OFF or disconnect the power plug.

Do not expose your body directly to cool air for a prolonged length of time.

•   This could be detrimental to your health.

The unit should not be installed, relocated, disassembled, altered, or repaired by the user.

•   An improperly handled air conditioner may cause fire, electric

shock, injury, or water leakage, etc. Consult your dealer.

•   If the power supply cord is damaged, it must be replaced by the manufacturer or its service agent in order to avoid a hazard.

| When installing, relocating, or servicing the unit, make sure that no substance other than the specified refrigerant (R32) enters the refrigerant circuit.

•   Any presence of foreign substance such as air can cause abnormal pressure rise and may result in explosion or injury.

•   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.

---|---
This appliance is not intended for use by persons (includ- ing children) with reduced physical, sensory or mental ca- pabilities, 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.

| Do not insert your finger, a stick, or other objects into the air inlet or outlet.

•   This may cause injury, since the fan inside rotates at high speeds during operation.

| In case of an abnormal condition (such as a burning smell), stop the air conditioner and disconnect the power plug or turn the breaker OFF.

•   A continued operation in the abnormal state may cause a mal-

function, fire, or electric shock. In this case, consult your dealer.

SAFETY PRECAUTIONS

  WARNING

| When the air conditioner does not cool or heat, there is a possibility of refrigerant leakage. If any refrigerant leak- age is found, stop operations and ventilate the room well and consult your dealer immediately. If a repair involves recharging the unit with refrigerant, ask the service techni- cian for details.

•   The refrigerant used in the air conditioner is not harmful. Normally, it does not leak. However, if refrigerant leaks and comes in contact with fire or heating part of such a fan heater, kerosene heater, or cooking stove, it will create harmful gas and there is risk of fire.

The user should never attempt to wash the inside of the indoor unit. Should the inside of the unit require cleaning, contact your dealer.

•   Unsuitable detergent may cause damage to plastic material inside the unit, which may result in water leakage. Should detergent come in contact with electrical parts or the motor, it will result in a malfunction, smoke, or fire.

•   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).

•   Be aware that refrigerants may not contain an odour.

•   Do not use means to accelerate the defrosting process or to clean the appliance, other than those recommended by the manufacturer.

•   Do not pierce or burn.

The indoor unit must be installed in rooms which exceed the floor space specified. Please consult your dealer.
  CAUTION
| Do not touch the air inlet or the aluminum fins of the indoor/ outdoor unit.

•   This may cause injury.

Do not use insecticides or flammable sprays on the unit.

•   This may cause a fire or deformation of the unit.

Do not expose pets or houseplants to direct airflow.

•   This may cause injury to the pets or plants.

Do not place other electric appliances or furniture under the indoor/outdoor unit.

•   Water may drip down from the unit, which may cause damage or malfunction.

Do not leave the unit on a damaged installation stand.

•   The unit may fall and cause injury.

Do not step on an unstable bench to operate or clean the unit.

•   This may cause injury if you fall down.

Do not pull the power cord.

•   This may cause a portion of the core wire to break, which may cause overheating or fire.

Do not charge or disassemble the batteries, and do not throw them into a fire.

•   This may cause the batteries to leak, or cause a fire or explosion.

Do not operate the unit for more than 4 hours at high hu- midity (80% RH or more) and/or with windows or outside door left open.

•   This may cause the water condensation in the air conditioner, which may drip down, wetting or damaging the furniture.

•   The water condensation in the air conditioner may contribute to growth of fungi, such as mold.

Do not use the unit for special purposes, such as storing food, raising animals, growing plants, or preserving preci- sion devices or art objects.

•   This may cause deterioration of quality, or harm to animals and plants.

Do not expose combustion appliances to direct airflow.

•   This may cause incomplete combustion.

Never put batteries in your mouth for any reason to avoid accidental ingestion.

•   Battery ingestion may cause choking and/or poisoning.

| Before cleaning the unit, switch it OFF and disconnect the power plug or turn the breaker OFF.

•   This may cause injury, since the fan inside rotates at high speeds during operation.

When the unit will be unused for a long time, disconnect the power plug or turn the breaker OFF.

•   The unit may accumulate dirt, which may cause overheating or fire.

| Replace all batteries of the remote controller with new ones of the same type.

•   Using an old battery together with a new one may cause overheating, leakage, or explosion.

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If the battery fluid comes in contact with your skin or clothes,

wash them thoroughly with clean water.

•   If the battery fluid comes in contact with your eyes, wash them thoroughly with clean water and immediately seek medical attention.

Ensure that the area is well-ventilated when the unit is oper- ated together with a combustion appliance.

•   Inadequate ventilation may cause oxygen starvation.

Turn the breaker OFF when you hear thunder and there is a possibility of a lightning strike.

•   The unit may be damaged if lightning strikes.

After the air conditioner is used for several seasons, perform inspection and maintenance in addition to normal cleaning.

•   Dirt or dust in the unit may create an unpleasant odor, con- tribute to growth of fungi, such as mold, or clog the drain pas- sage, and cause water to leak from the indoor unit. Consult your dealer for inspection and maintenance, which require specialized knowledge and skills.

| Do not operate switches with wet hands.

•   This may cause electric shock.

Do not clean the air conditioner with water or place an object

that contains water, such as a flower vase, on it.

•   This may cause fire or electric shock.

| Do not step on or place any object on the outdoor unit.

•   This may cause injury if you or the object falls down.

IMPORTANT Dirty fi lters cause condensation in the air conditioner which will con-tribute to the growth of fungi such as mold. It is therefore recommended to clean air fi lters every 2 weeks.

For installation

  WARNING

| Consult your dealer for installing the air conditioner.

•   It should not be installed by the user since installation requires specialized knowledge and skills. An improperly installed air conditioner may cause water leakage, fire, or electric shock.

Provide a dedicated power supply for the air conditioner.

•   A non-dedicated power supply may cause overheating or fire.

Do not install the unit where flammable gas could leak.

•   If gas leaks and accumulates around the outdoor unit, it may cause an explosion.

| Earth the unit correctly.

•   Do not connect the earth wire to a gas pipe, water pipe, light- ning rod, or a telephone earth wire. Improper earthing may cause electric shock.

  CAUTION
| Install an earth leakage breaker depending on the installation

location of the air conditioner (such as highly humid areas).

•   If an earth leakage breaker is not installed, it may cause electric shock.

Ensure that the drain water is properly drained.

•   If the drain passage is improper, water may drip down from the indoor/outdoor unit, wetting and damaging the furniture.

NAME OF EACH PART

Indoor unit

• < GR10/13/15>
  

• < GR18/24/28>

Outdoor unit

Remote controller

Only use the remote controller provided with the unit. Do not use other remote controllers. If two or more indoor units are installed in proximity to one another, an indoor unit that is not intended to be operated may respond to the remote controller.

PREPARATION BEFORE OPERATION

Before operation: Insert the power supply plug into the power outlet and/or turn the breaker on.

Installing the remote controller batteries

Note:

• Make sure the polarity of the batteries is correct.
• Do not use manganese batteries and leaking batteries. The remote controller could malfunction.
• Do not use rechargeable batteries.
• The battery replacement indicator lights up when the battery is running low. In about 7 days after the indicator starts lights up, the remote controller stops working.
• Replace all batteries with new ones of the same type.
• Batteries can be used for approximately 1 year. However, batteries with ex-pired shelf lives last shorter.
• Press RESET gently using a thin instrument.
  If the RESET is not pressed, the remote controller may not operate correctly.

Setting current time

Note: How to set remote controller exclusively for a particular indoor unit A maximum of 4 indoor units with wireless remote controllers can be set.

To operate the indoor unit individually with each re-mote controller, assign a number to each remote controller according to the number of the indoor unit. Please set according to the following procedure:

1. Turn the breaker OFF for the unit.
2. With the remote controller powered OFF, hold down UNIT on the remote controller for 2 seconds to enter the pairing mode. Setting number is displayed in the remote controller.
3. Press UNIT again and assign a number to each remote controller. Each press of UNIT advances the number in the following order: 1→2→3→4.
4. Press to complete the pairing setting. After you turn the breaker ON, the remote controller that fi rst sends a signal to an indoor unit will be regarded as the remote controller for the indoor unit. Once they are set, the indoor unit will only receive the signal from the assigned remote controller afterwards. The setting of indoor unit will be cancelled, if the breaker is turned OFF or the power supply is shut down.

SELECTING OPERATION MODES

1. Press to start the operation.
2. Press to select operation mode. Each press changes mode in the following order:
3. Press or to set the temperature. Each press raises or lowers the temperature by 1°C.
   • Press to stop the operation.
   • The same setting is selected the next time by simply pressing .

Note: Operation indicator lamp
The operation indicator lamp shows the operation state of the unit .

FEEL mode
The unit selects the operation mode according to the room temperature when I FEEL is selected. When the room temperature is higher than 25°C, COOL is selected (set temperature: 24°C). When the room temperature is lower than 25°C, DRY is selected. However, when operation is stopped and then started within 2 hours, the mode which has been selected previously is operated.
Note: During COOL operation, the set temperature may not be changed when the room temperature is more than 2°C higher than the set temperature. In this case, please wait until the room temperature drops to within 2°C of the set temperature.

COOL mode
Enjoy cool air at your desired temperature.
DRY mode
Dehumidify your room. The room may be cooled slightly. Temperature cannot be set during DRY mode.
FAN mode
Circulate the air in your room.

FAN SPEED AND AIRFLOW DIRECTION ADJUSTMENT

Fan speed

• Press to select fan speed. Each press changes fan speed in the following order:
  • Two short beeps are heard from the indoor unit when set to AUTO.
  • Use higher fan speed to cool the room more powerfully. It is recommended to lower the fan speed once the room is cool.
  • Use lower fan speed for quiet operation.
  • Use lower fan speed to further lower the outlet temperature and humidity.

Up-down Airflow direction

• Press to select airfl ow direction. Each press changes airfl ow direction in the following order:
  • (AUTO) ………The vane is set to the most efficient airflow direction. :horizontal position.
  • (Manual) …….For efficient air conditioning, select the upper position for COOL/DRY, and the lower position for FAN. If the lower position is selected during COOL/DRY, the vane automatically moves to the upward position after 0.5 to 1 hour to prevent any condensation from dripping.
  • (Swing) ………The vane moves up and down intermittently

Left-right Airflow direction

• < GR10/13/15>

  • To change the horizontal airfl ow direction.
    Move the vertical vanes from side to side by pinching the tabs indicated by arrows before starting operation.

• < GR18/24/28>

  • Press to select airfl ow direction. Each press changes airfl ow direction in the following order:

FAST COOLING OPERATION

• Press during COOL mode to start FAST COOLING operation.
  • Fan speed: Exclusive speed for FAST COOLING mode
  • Horizontal vane: The vane follows as your selection during Manual/ Swing. Exclusive position during AUTO operation.
  • Vertical vane: The vane follows as your selection during Manual/ Swing.
• Press again to cancel FAST COOLING operation.
  • FAST COOLING operation is also cancelled automatically in 15 minutes, or when the MODE, OFF/ON, FAN, or SLEEP button is pressed.

SLEEP OPERATION

Press during COOL mode to start SLEEP operation.

• Set temperature will change over time.
• Set temperature will be controlled slightly lower for about 2 hours. It will help you fall asleep more easily.
• Air direction can be changed as you like.
• SLEEP operation cannot be set when ON timer is on stand-by.

Press again to cancel SLEEP operation.

• SLEEP operation is also cancelled when the MODE, FAST, OFF/ON or ON TIMER button is pressed.

TIMER OPERATION (ON/OFF TIMER)

1. Press or during operation to set the timer.

   • (ON timer): The unit turns ON at the set time.
   • (OFF timer): The unit turns OFF at the set time.

2. Press (Increase) and (Decrease) to set the time of timer.
   Each press increases or decreases the set time by 10 minutes.

   • Set the timer while or is blinking

3. Press or again to cancel timer.

Note:

• ON and OFF timers can be set together. mark indicates the order of timer operations.
• If power failure occurs while ON/OFF timer is set, “Auto restart function”.

EMERGENCY OPERATION

When the remote controller cannot be used…
Emergency operation can be activated by pressing the emergency operation switch (E.O. SW) on the indoor unit.

Note: The fi rst 30 minutes of operation is test run. Temperature control does not work, and fan speed is set to High.

AUTO RESTART FUNCTION
If a power failure occurs or the main power is turned off during operation, “Auto restart function” automatically starts operation in the same mode as the one set with the remote controller just before the shutoff of the main power. When timer is set, timer setting is cancelled and the unit starts operation when power is resumed. If you do not want to use this function, please consult the service representative because the setting of the unit needs to be changed.

CLEANING

Instructions:

• Switch off the power supply or turn off the breaker before cleaning.
• Be careful not to touch the metal parts with your hands.
• Do not use benzine, thinner, polishing powder, or insecticide.
• Use only diluted mild detergents.
• Do not expose parts to direct sunlight, heat, or fi re to dry.
• Do not use water hotter than 50°C.
• Do not use a scrubbing brush, a hard sponge, or the like.
• Do not soak or rinse the horizontal vane.
• Do not apply excessive force on the fan as it may cause cracks or breakage.

Air outlet and Fan (before cleaning, make sure that the fan is stopped)

1. Turn the horizontal vanes downward. Then, remove the upper vane as shown in 1 and 2.
   • Repeat 1 and 2 for the lower vane.
2. Swing out the two vertical vanes one by one.
3. Clean the air outlet and fan.
   • Wipe with a soft dry cloth.
4. Put the vertical vanes back to their original positions correctly one by one, into their respective guide.
   • Push the vanes until they click into place.
5. Install the horizontal vanes by following the removal procedure in reverse.
   • If the horizontal vanes are not installed correctly, all LED lamps blink when power is turned on.

WHEN YOU THINK THAT TROUBLE HAS OCCURRED

Even if these items are checked, when the unit does not recover from the trouble, stop using the air conditioner and consult your dealer.

Indoor Unit
The unit cannot be operated.| •  Is the breaker turned on?

•  Is the power supply plug connected?

•  Is the ON timer set?

All LED lamps on the indoor unit are blinking.| •  Are the horizontal vanes installed correctly?
The horizontal vane does not move.| •  Are the horizontal vane and the vertical vane installed correctly?

•  Is the fan guard deformed?

The unit cannot be operated for about 3 minutes when restarted.| •  This protects the unit according to instruc- tions from the microprocessor. Please wait.
Mist is discharged from the air outlet of the indoor unit.| •  The cool air from the unit rapidly cools mois- ture in the air inside the room, and it turns into mist.
The swing operation of the HORIZONTAL VANE is suspended for a while, then restarted.| •  This is for the swing operation of the HORI- ZONTAL VANE to be performed normally.
The air flow direction changes during operation.

The direction of the horizontal vane cannot be adjusted with the remote controller.

| •  When the unit is operated in COOL or DRY mode, if the operation continues with air blowing down for 0.5 to 1 hour, the direction of the air flow is automatically set to upward position to prevent water from condensing and dripping.
The unit starts operation by itself when the main power is turned on, though it isn’t operated with the remote controller.| •  These models are equipped with an auto re- start function. When the main power is turned off without stopping the unit with the remote controller and is turned on again, the unit starts operation automatically in the same mode as the one set with the remote control- ler just before the shutoff of the main power. Refer to “Auto restart function”.
The indoor unit discolors over time.| •  Although plastic turns yellow due to the influ- ence of some factors such as ultraviolet light and temperature, this has no effect on the product functions.
Outdoor Unit
The fan of the outdoor unit does not rotate even though the compressor is running. Even if the fan starts to rotate, it stops soon.| •  When the outside temperature is low during cooling operation, the fan operates intermit- tently to maintain sufficient cooling capacity.
Water leaks from the outdoor unit.| •  During COOL and DRY operations, pipe or pipe connecting sections are cooled and this causes water to condense.
Remote controller
The display on the remote controller does not appear or it is dim. The indoor unit does not respond to the remote control signal.| •  Are the batteries exhausted?

•  Is the polarity (+, -) of the batteries correct?

•  Are any buttons on the remote controller of

other electric appliances being pressed?

Does not cool
The room cannot be cooled sufficiently.| •  Is the temperature setting appropriate?

•  Is the fan setting appropriate? Please change fan speed to High or Super High.

•  Are the filters clean?

•  Is the fan or heat exchanger of the indoor unit clean?

•  Are there any obstacles blocking the air inlet or outlet of the indoor or outdoor unit?

•  Is a window or door open?

•  When a ventilation fan or a gas cooker is used in a room, the cooling load increases, resulting in an insufficient cooling effect.

•  When the outside temperature is high, the

cooling effect may not be sufficient.

•  It may take a certain time to reach the setting temperature or may not reach that depending on the size of the room, the ambient tempera- ture, and the like.

Airflow
The air from the indoor unit smells strange.| •  Are the filters clean?

•  Is the fan or heat exchanger of the indoor unit clean?

•  The unit may suck in an odor adhering to the wall, carpet, furniture, cloth, etc. and blow it

out with the air.

Sound
Cracking sound is heard.| •  This sound is generated by the expansion/ contraction of the front panel, etc. due to change in temperature.
“Burbling” sound is heard.| •  This sound is heard when the outside air is absorbed from the drain hose by turning on the range hood or the ventilation fan, making water flowing in the drain hose to spout out. This sound is also heard when the outside air blows into the drain hose in case the outside wind is strong.
Mechanical sound is heard from the indoor unit.| •  This is the switching sound in turning on/off the fan or the compressor.
The sound of water flowing is heard.| •  This is the sound of refrigerant or condensed

water flowing in the unit.

Hissing sound is sometimes heard.| •  This is the sound when the flow of refrigerant

inside the unit is switched.

In the following cases, stop using the air conditioner and consult your dealer.

• When water leaks or drips from the indoor unit.

• When the upper operation indicator lamp blinks.
  Except for when the lamp of a multi-unit blinks while the unit is on standby.

• When the breaker trips frequently.

• The remote control signal is not received in a room where an electronic ON/OFF type fluorescent lamp (inverter-type fluorescent lamp, etc.) is used.

• Operation of the air conditioner interferes with radio or TV reception. An amplifier may be required for the affected device.

• When an abnormal sound is heard.

• When any refrigerant leakage is found.

ERROR CODE DISPLAY MODE

Error code can be checked on the display of remote controller while the upper operation indicator lamp on the indoor unit is blinking.
Follow the procedure below to check the error code.

Error code display

• The remote controller is powered OFF.
• Get close to the front of the indoor unit (within 2 m), point the remote controller at the receiving section of indoor unit, and keep pressing the CHECK with a fine-tipped object until the display of remote controller turns off.
• Keep pointing the remote controller at the receiving section of indoor unit, until the error code (2 digits) appears on the display after the indoor unit beeps.

Error code check

• If “–” appears on the display, it means the remote controller has not received the signal from the indoor unit. Press any button to cancel the error code display mode. Get closer to the indoor unit, and try again. If the remote controller still can not receive it, please turn off the noise source (fluorescent lamp, TV etc.).
• “00” appears on the display when there is no error.
• When an error code (other than “00”) appears on the display, the air conditioner needs to be inspected and repaired. Stop using the air conditioner, turn off the breaker and contact your dealer.

Note:

• Any button can cancel the error code display mode of the remote controller.
• Proper error code may not appear if the error code is checked while the operation indicator lamp is not blinking.

Error code of remote controller

E7
Fb| Indoor control system
P1| Room temperature thermistor
P2| Indoor coil thermistor
P9
Pb| Indoor fan motor
Outdoor unit| E8| Indoor/outdoor communication, receiving error
E9
EC
FC| Nonvolatile memory data
Fd| Different voltage
P8| 4-way valve/Pipe temperature
PL| Outdoor refrigerant system
U3| Discharge temperature thermistor
U4| Defrost thermistor
Fin temperature thermistor
P.C. board temperature thermistor
Ambient temperature thermistor
Outdoor heat exchanger temperature thermistor
UE| Stop valve (Closed valve)
UP| Outdoor power system

WHEN THE AIR CONDITIONER IS NOT GOING TO BE USED FOR A LONG TIME

1. Operate by COOL mode with the highest temperature set or FAN mode for 3 to 4 hours.
   • This dries the inside of the unit.
   • Moisture in the air conditioner contributes to growth of fungi, such as mold.
2. Press to stop the operation.
3. Turn off the breaker and/or disconnect the power supply plug.
4. Remove all batteries from the remote controller.

When using the air conditioner again:

1. Clean the air fi lter.
2. Check that the air inlet and outlet of the indoor and outdoor units are not blocked.
3. Check that the earth is connected correctly.
4. Refer to the “PREPARATION BEFORE OPERATION”, and follow the instructions.

INSTALLATION PLACE AND ELECTRICAL WORK

Installation place
Avoid installing the air conditioner in the following places.

• Where there is much machine oil.
• Salty places such as the seaside.
• Where sulfide gas is generated such as hot spring, sewage, waste water.
• Where oil is splashed or where the area is filled with oily smoke (such as cooking areas and factories, in which the properties of plastic could be changed and damaged).
• Where there is high-frequency or wireless equipment.
• Where the air from the outdoor unit air outlet is blocked.
• Where the operation sound or air from the outdoor unit bothers the house next door.
• The mounting height of indoor unit 1.8 m to 2.3 m is recommended. If it is impossible, please consult your dealer.
• The indoor unit must be installed in rooms which exceed the floor space specific ed. Please consult your dealer.
• Do not operate the air conditioner during interior construction and finishing work, or while waxing the floor. Before operating the air conditioner, ventilate the room well after such work is performed. Otherwise, it may cause volatile elements to adhere inside the air conditioner, resulting in water leakage or scattering of dew.

Electrical work

• Provide an exclusive circuit for the power supply of the air conditioner.
• Be sure to observe the breaker capacity.

If you have any questions, consult your dealer.

SPECIFICATIONS

Guaranteed operating range

| Indoor| Outdoor
---|---|---
Upper limit| 32°C DB| 46°C DB
23°C WB| —
Lower limit| 21°C DB| 21°C DB
15°C WB| —

HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

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