MITSUBISHI ELECTRIC MSZ-GS80VFD Split-Type Air Conditioners Instruction Manual

MITSUBISHI ELECTRIC MSZ-GS80VFD Split-Type Air Conditioners

SAFETY PRECAUTIONS

•  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.
• 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 securely 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 (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 playwith 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 malfunction, fire, or electric shock. In this case, consult your dealer.
• When the air conditioner does not cool or heat, there is a possibility of refrigerant leakage. If any refrigerant leakage 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 technician 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.
• This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for commercial use by lay persons.
• 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 humidity (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 precision 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.
• 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 operated 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, contribute to growth of fungi, such as mold, or clog the drain passage, 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.

NAME OF EACH PART

Indoor unit <GS25/35/50/60>
< GS71/80>
Remote controller
Outdoor unit

PREPARATION BEFORE OPERATION

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.
•  Replace all batteries with new ones of the same type.
•  Batteries can be used for approximately 1 year. However, batteries with expired shelf lives last shorter.
•  Press RESET gently using a thin instrument.
• If the RESET button is not pressed, the remote controller may not operate correctly

SELECTING OPERATION MODES

• Press to start the operation.
•  Press to select operation mode. Each press changes mode in the following order:
•  Press or or to set the temperature.
• Each press raises or lowers the temperature by 1°C.
• Press to stop the operation

COOL mode

Enjoy cool air at your desired temperature.
Note:
Do not operate COOL mode at very low outside temperatures (less than -10°C). Water condensed in the unit may drip and wet or damage furniture, etc.

DRY mode

Dehumidify your room. The room may be cooled slightly. Temperature cannot be set during DRY mode.

HEAT mode

Enjoy warm air at your desired temperature.

FAN mode

Circulate the air in your room.
Note: After COOL/DRY mode operation, it is recommended to operate in the FAN mode to dry inside the indoor unit.

Operation indicator lamp

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/heat the room more powerfully. It is recommended to lower the fan speed once the room is cool/warm.
•  Use lower fan speed for quiet operation.

Up-down Airflow direction

• Press to select airflow direction. Each press changes airflow direction in the following order:
• (AUTO) The vane is set to the most efficient airflow direction. COOL/ DRY/FAN: a horizontal position. HEAT: downward position.
• (Manual)  For efficient air conditioning, select the upward position for COOL/DRY, and the downward position for HEAT. If the downward position is selected during COOL/DRY, the vane automatically moves to the horizontal position after 0.5 to 1 hour to prevent any condensation from dripping.
• (Swing)  The vane moves up and down intermittently.
•  Two short beeps are heard from the indoor unit when set to AUTO.

Left-right Airflow direction

To change the horizontal airflow direction. Move the vertical vane manually before starting operation.

ECONO COOL OPERATION

Swing airflow (change of air flow) makes you feel cooler than stationary airflow. The set temperature and the airflow direction are automatically changed by the microprocessor. It is possible to perform cooling operation with keeping comfort. As a result energy can be saved

• Press during COOL mode page 5 to start
• ECONO COOL operation.
• The unit performs swing operation vertically in various cycle according to the temperature of the unit. Set temperature is set 2°C higher automatically
• Press again to cancel ECONO COOL operation.
•  Pressing also cancels ECONO COOL operation.

TIMER OPERATION (ON/OFF TIMER)

•  Press during operation to set the timer. Each press changes timer mode in the following order:
•  Press to set the time of timer. Each press increases or decreases the set time by 1 hour. Press until “TIMER RELEASE” is selected to release timer.

Note:

•  ON and OFF timers can not be used in combination.
•  If power failure occurs while ON/OFF timer is set, see page 7 “Auto restart function”.

DEMAND RESPONSE AND INDOOR UNIT OPERATION

Demand response

This unit has demand response capability which is compliant with AS/NZS 4755.3.1. To activate this function, you need to make a contract with remote agents such as electric supply company, then this unit should be connected to Demand response enabling devise (DRED). For further information, consult your dealer. Demand response represents the automated alteration of an electrical product’s normal mode of operation in response to an initiating signal originating from or defined by a remote agent. This unit supports 3 Demand Response Modes (DRMs)

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. Each time the E.O.SW is pressed, the operation changes in the following order:

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 neutral detergents.
•  Do not use a scrubbing brush, a hard sponge, or the like.
•  Do not soak or rinse the horizontal vane.
•  Do not use water hotter than 50°C.
•  Do not expose parts to direct sunlight, heat, or fire to dry.
•  Do not apply excessive force on the fan as it may cause cracks or breakage.

Air cleaning filter

• (Anti-Allergy Enzyme Filter, option)
  • Back side of air filter
  • Clean every 3 months:
  •  Remove dirt by a vacuum cleaner.
  •  Put it back to its original position, and install all tabs of the air filter.
• When dirt cannot be removed by vacuum cleaning:
  •  Soak the filter and its frame in lukewarm water before rinsing it. (Diluted mild detergents can be used when dirt cannot be removed.)
  •  After washing with water, dry it well in shade. Install all tabs of the air filter.
• Every year:
  •  Replace it with a new air cleaning filter for best performance.
  •  Parts Number

Front panel

•  Lift the front panel until a “click” is heard.
•  Hold the hinges and pull to remove as shown in the above illustration.
•  Wipe with a soft dry cloth or rinse it with water.
•  Do not soak it in water for more than two hours.
•  Dry it well in shade.
•  Install the front panel by following the removal procedure in reverse. Clos

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

• <GS25/35/50/60>
  • Turn the horizontal vane downward. Then, remove the vane as shown in ➀ and ➁.
• <GS71/80>
  • Turn the horizontal vanes downward. Then, remove the upper vane as shown in ➀ and ➁.
•  Repeat ➀ and ➁ for the lower vane.
• Swing out the two vertical vanes one by one.
• Clean the air outlet and fan.
•  Wipe with a soft dry cloth Put the vertical vanes back to theiroriginal positions correctly one by one, into their respective guide.
•  Push the vanes until they click into place.  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

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

•   Is the power supply plug connected?

•   Is the ON timer set? Page 6

All LED lamps on the indoor unit are blinking.| •   Are the horizontal vanes installed correctly?

Page 8

The horizontal vane does not move.| •      Are the horizontal vane and the vertical vane installed correctly? Page 8

•      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 airflow 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 airflow is automatically set to horizon- tal position to prevent water from condensing and dripping.

•   In the heating operation, if the airflow tem- perature is too low or when defrosting is be- ing done, the horizontal vane is automatically set to horizontal position.

The operation stops for about 10 minutes in the heating operation.| • Outdoor unit is in defrost.

Since this is completed in max. 10 minutes, please wait. (When the outside temperature is too low and humidity is too high, frost is formed.)

The unit starts operation by itself when the main power is turned on, but isn’t received sign from the remote control- ler.| •      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” Page 7 .
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.

•   In the heating operation, water condensed on the heat exchanger drips down.

•   In the heating operation, the defrosting operation makes ice forming on the outdoor unit melt and drip down.

White smoke is discharged from the outdoor unit.| •   In the heating operation, vapor generated by the defrosting operation looks like white smoke.
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? Page 4

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

Page 4

•   Are any buttons on the remote controller of other electric appliances being pressed?

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

Page 5

•   Is the fan setting appropriate? Please change fan speed to High or Super High. Page 6

•   Are the filters clean? Page 8

•   Is the fan or heat exchanger of the indoor unit clean? Page 8

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

•   Is a window or door open?

•   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.

The room cannot be cooled sufficiently.| •   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.

The room cannot be heated sufficiently.| •   When the outside temperature is low, the heating effect may not be sufficient.
Air does not blow out soon in the heating operation.| •   Please wait as the unit is preparing to blow out warm air.
Poor cooling or heating performance.| •   Do you have an arrangement with your elec- tric company for Demand Response?
Airflow
The air from the indoor unit

smells strange.

| •      Are the filters clean? Page 8

•      Is the fan or heat exchanger of the indoor unit clean? Page 8

•      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 off/on 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 changed.

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

•  Operate by COOL mode with the highest temperature set or FAN mode for 3 to 4 hours. Page 5
•  This dries the inside of the unit.
•  Moisture in the air conditioner contributes to growth of fungi, such as mold.
•  Press to stop the operation.
•  Turn off the breaker and/or disconnect the power supply plug.
•  Remove all batteries from the remote controller.

When using the air conditioner again:

• Clean the air filter. Page 8
•  Check that the air inlet and outlet of the indoor and outdoor units are not blocked.
•  Check that the earth is connected correctly.
•  Refer to the “PREPARATION BEFORE OPERATION”, and follow the instructions. Page 4

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 1.8m to 2.3m is recommended. If it is impossible, 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.
•  The indoor unit must be installed in rooms which exceed the floor space specified. Please consult your dealer.

SPECIFICATIONS

Cooling

| Upper limit| 32°C DB

23°C WB

| 46°C DB

—

Lower limit| 21°C DB

15°C WB

| -10°C DB

—

Heating

| Upper limit| 27°C DB

—

| 24°C DB

18°C WB

Lower limit| 20°C DB

—

| -15°C DB

-16°C WB

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