MITSUBISHI ELECTRIC Split-Type Air Conditioners Instruction Manual
- June 7, 2024
- Mitsubishi Electric
Table of Contents
- MITSUBISHI ELECTRIC Split-Type Air Conditioners Instruction Manual
- OPERATING INSTRUCTIONS
- SAFETY PRECAUTIONS
- Marks and their meanings
- Meanings of symbols used in this manual
- S AFETY PRECAUTIONS
- OPERATING INSTRUCTIONS
- P REPARATION BEFORE OPERATION
- S ELECTING OPERATION MODES
- Emergency operation
- Auto restart function
- FAN SPEED AND AIRFLOW DIRECTION ADJUSTMENT
- Airflow direction
- ECONO COOL OPERATION
- TIMER OPERATION (ON/OFF TIMER)
- CLEANING
- WHEN YOU THINK THAT TROUBLE HAS OCCURRED
- WHEN THE AIR CONDITIONER IS NOT GOING TO BE USED FOR A LONG TIME
- INSTALLATION PLACE AND ELECTRICAL WORK
- SPECIFICATIONS
- Read More About This Manual & Download PDF:
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
MITSUBISHI ELECTRIC Split-Type Air Conditioners Instruction Manual
OPERATING INSTRUCTIONS
- To use this unit correctly and safely, be sure to read these operating instructions before use.
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.
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.
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 securely into the
outlet.
• A dirty plug may cause fire or electric shock.
Do not bundle, pull, 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 (R410A) 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 break- down. In the
worst case, this could lead to a serious impediment to securing product
safety.
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.
| 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.
| 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 malfunc- tion,
fire, or electric shock. In this case, consult your dealer.
| When the air conditioner does not cool or heat, there is a pos- sibility
of refrigerant leakage. In this case, consult your dealer. If a repair
involves recharging the unit with refrigerant, ask the service technician for
details.
• The refrigerant used in the air conditioner is safe. Normally, it does not leak. However, if refrigerant leaks and comes in contact with a heat source such as a fan heater, kerosene heater, or cooking stove, it will create a harmful gas.
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.
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.
S AFETY PRECAUTIONS
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 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 ac- cidental
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 pos- sibility 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.
IMPORTANT
Dirty filters cause condensation in the air conditioner which will
contribute to the growth of fungi such as mold. It is therefore recommended to
clean air filters every 2 weeks.
WARNING
| Consult your dealer for installing the air conditioner.
• It should not be installed by the user since installation requires
spe- cialized 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 unit, it may cause an
explosion.
**| Ground the unit correctly.
• Do not connect the ground wire to a gas pipe, water pipe, lightning
rod, or a telephone ground wire. Improper grounding may cause electric shock.
CAUTION
**| Install a Ground Fault Interrupt (GFI) circuit breaker depending on
the installation location of the air conditioner (such as highly humid areas).
• If the Ground Fault Interrupt (GFI) 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.
In case of an abnormal condition
Immediately stop operating the air conditioner and consult your dealer.
OPERATING INSTRUCTIONS
NAME OF EACH PART
Indoor unit
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.
P REPARATION BEFORE OPERATION
Before operation: Insert the power supply plug into the power outlet and/or turn the breaker on.
Installing the remote controller batteries
-
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 If the RESET button is not pressed, the remote controller may not operate correctly.
Changing temperature units (°F→°C)
Unit is preset with °F.
- Press RESET while the temperature but- tons are pressed.
- Press RESET gently using a thin instrument.
- To change temperature unit from °C to °F, press RESET
S ELECTING OPERATION MODES
-
Press to start the operation.
-
Press to select operation mode. Each press changes mode in the following order.
-
Press to set the temperature. Each press raises or lowers the temperature by 1°F (1°C).
Press to stop the operation.
• The same setting is selected the next time by simply pressing .
Operation indicator lamp
The operation indicator lamp shows the operation state of the unit.
COOL mode
Enjoy cool air at your desired temperature.
Note: Do not operate COOL mode at very low outside temperatures (less
than 14°F [-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
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 first 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.
FAN SPEED AND AIRFLOW DIRECTION ADJUSTMENT
• Two short beeps are heard from the indoor unit when set to AUTO.
Airflow direction
(AUTO) ….The vane is set to the most efficient airflow direction. COOL/ DRY:
horizontal position. HEAT: position (5).
(Manual)…For efficient air conditioning, select the upper position for COOL/
DRY, and the lower position for HEAT. If the position (4) or (5) 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.
To change the horizontal airflow direction. Move the vertical vane
manually before starting operation.
ECONO COOL OPERATION
Press during COOL mode to start ECONO COOL operation.
The unit performs swing operation vertically in various cycle according to the
temperature of the airflow. Set temperature is set 4°F (2°C) higher
automatically.
Press again to cancel ECONO COOL operation.
- ECONO COOL operation also is cancelled when the VANE button is pressed.
What is “ECONO COOL”?
Swing air fl ow (change of air fl ow) makes you feel cooler than constant air
flow. So, even though the set temperature is automatically set 4°F (2°C)
higher, it is possible to perform cooling operation with keeping comfort. As a
result, energy can be saved.
TIMER OPERATION (ON/OFF TIMER)
Note:
- ON and OFF timers can not be used in combination.
- If power failure occurs while ON/OFF timer is set, see page 5 “Auto restart function”.
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 120°F (50°C).
-
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 before installing it. -
Install the front panel by following the removal procedure in reverse. Close the front panel securely and press the positions indicated by the arrows.
Important
- Clean the fi lters regularly for best performance and to reduce power consumption.
- Dirty fi lters cause condensation in the air conditioner which will contribute to the growth of fungi such as mold. It is therefore recommended to clean air filters every 2 weeks.
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.
Symptom | Explanation & Check points |
---|
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
The unit cannot be operated for about 3 minutes when restarted.| • This
protects the unit according to instructions from the microprocessor.
Please wait.
Mist is discharged from the air outlet of the indoor unit.| • The cool air
from the unit rapidly cools moisture 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 HORIZON- TAL 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 upward position to prevent water from
condensing and dripping.
• In the heating operation, if the airflow temperature is too low or when
defrosting is being 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
hasn’t received sign from the remote controller.| • These models are equipped
with an auto restart 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 5
The indoor unit discolors over time.| • Although plastic turns yellow due to
the influence 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 cool- ing operation, the fan operates intermittently
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.
Symptom| Explanation & Check points
---|---
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 7
• 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?
• 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 temperature, 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.
Airflow
The air from the indoor unit smells strange.| • Are the filters clean? Page 7
• 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/con-
traction 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 changed.
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.
- 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 fl uorescent 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.
WHEN THE AIR CONDITIONER IS NOT GOING TO BE USED FOR A LONG TIME
1 Set to the highest temperature in manual COOL mode, and operate
for 3 to 4 hours. Page 5
- This dries the inside of the unit.
- Moisture in the air conditioner contributes to favorable conditions for growth of fungi, such as mold.
2 Press to stop the operation.
- Turn off the breaker and/or disconnect the power supply
- Remove all batteries from the remote plug.
When using the air conditioner again:
1 Clean the air filter. Page 7
- Check that the air inlet and outlet of the indoor and outdoor units are not blocked.
3 Check that the ground wire is connected correctly.
- Refer to the “PREPARATION BEFORE OPERATION”, and follow the 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 sulfi de gas is generated such as hot spring, sewage, waste water.
- Where oil is splashed or where the area is fi lled 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 brothers the house next door.
- The mounting height of indoor unit 5.9 ft. to 7.5 ft. (1.8 m to 2.3 m) is recommended. If it is impossible, please consult your dealer.
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
Note:
- The guaranteed operating range value is for 1:1 System Application.
- If the outdoor temperature is below the lower limit of guaranteed operating range, the outdoor unit
may stop operation until the outdoor temperature exceeds the lower limit.