MITSUBISHI ELECTRIC MSH-GA71VB (01) PDF DOCUMENT

Please observe the following safety precautions when using your MITSUBISHI ELECTRIC MSH-GA71VB:

WARNINGS:

• Do not use an extension cord or connect multiple devices to one AC outlet. This can cause poor contact, poor insulation, or exceed the permissible current, leading to fire or electric shock.

• Ensure the power supply plug is clean and inserted securely. A dirty or loose plug can cause fire or electric shock.

• Do not damage or modify the power supply cord. Placing heavy objects on it, scratching, or processing it can lead to fire or electric shock.

• Do not turn the breaker on/off or connect/disconnect the power plug during operation, as this may create sparks and cause a fire. Always turn the unit off with the remote controller first.

• Do not expose your skin directly to cool air for a long time, as this could be harmful to your health.

• Installation, repairs, or relocation must be done by your dealer, not by the customer. Incorrect work can cause fire, electric shock, injury from the unit falling, or water leakage.

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

• Never insert your finger, a stick, or other objects into the air inlet or outlet. The fan rotates at high speed and can cause injury.

• If you notice an abnormality such as a burning smell, immediately stop the air conditioner, disconnect the power plug, and turn off the breaker. Consult your dealer.

CAUTIONS:

• When removing the air filter, do not touch the metal parts of the indoor unit to avoid injury.

• Do not touch the air inlet or aluminum fins of the outdoor unit.

• Do not place vases, glasses, insecticides, or flammable sprays on or near the unit.

• Do not place pets or houseplants in the direct path of the airflow.

• Do not operate the unit for a long time in high humidity (80% RH or more) with a door or window open, as condensed water may drip and damage furniture.

Power Supply:

Insert the power supply plug into the power outlet and/or turn the breaker on. Ensure the plug is clean and inserted securely to prevent fire or electric shock.

Set up the Remote Controller:

1. Remove the front lid of the remote and insert two new AAA alkaline batteries. Insert the minus pole first and check for correct polarity.

2. Press the RESET button using a thin stick. If this is not pressed, the remote may not operate correctly.

3. Press the CLOCK set button using a thin stick.

4. Use the HR. and MIN. time set buttons to set the current time. Each press of the HR. button advances the time by one hour, and each press of the MIN. button advances it by one minute.

5. Press the CLOCK set button again and close the front lid.

Note on batteries: Replace batteries when the indoor unit does not respond to the signal or when the remote display becomes dim. Use new AAA alkaline batteries and replace both at the same time. Do not use rechargeable batteries.

If the remote controller’s batteries are dead or the remote is malfunctioning, you can use the EMERGENCY OPERATION switch located on the indoor unit (when the front panel is opened).

1. Press the EMERGENCY OPERATION switch. Each press cycles the unit through the modes in this order: EMERGENCY COOL MODE -> EMERGENCY HEAT MODE -> STOP.

2. When first pressed, the unit will operate in a test run for 30 minutes. After 30 minutes, it will shift to the corresponding emergency mode.

3. To stop the operation, press the EMERGENCY OPERATION switch once if in HEAT mode, or twice if in COOL mode.

The details of the emergency operation modes are as follows:

The operation mode is indicated by the Operation Indicator lamp on the indoor unit.

The ‘I FEEL…’ auto operation mode automatically sets the optimum room condition with a single touch.

To start operation: Press the ON/OFF button. If the ‘(I FEEL…)’ mode is not already selected, press the MODE button until it is set.

To stop operation: Press the ON/OFF button.

Temperature Adjustment:

• If you feel slightly warm: Press the ▼ button to lower the temperature. One press lowers it by about 1°C.

• If you feel slightly cool: Press the ▲ button to raise the temperature. One press raises it by about 1°C.

How it works:

The MITSUBISHI ELECTRIC MSH-GA71VB automatically selects COOL, DRY, or HEAT mode based on the room temperature when it starts. The initial target temperatures are:

The MITSUBISHI ELECTRIC MSH-GA71VB is equipped with an auto restart function. If a power failure occurs or the main power is turned off during operation, this function automatically restarts the unit in the same mode (operation mode, set temperature, fan speed) that was set on the remote controller just before the power shutoff.

• If the unit was turned off with the remote controller before the power failure, it will remain off when power is restored.

• If the unit was in ‘I FEEL…’ mode, the operation is not stored. The mode will be re-determined by the initial room temperature upon restart.

• If you do not want to use this function, the setting needs to be changed by a service representative.

1. Select an Operation Mode:

Press the MODE button. Each press changes the mode in the following sequence: (I FEEL…) → (COOL) → (DRY) → (HEAT).

2. Set the Temperature:

• Press the ▼ button to lower the temperature (by about 1°C per press).

• Press the ▲ button to raise the temperature (by about 1°C per press).

3. Adjust the Fan Speed (Air Flow Velocity):

Press the FAN button. Each press changes the speed in the following sequence: (Low) → (Med.) → (High) → (AUTO).

4. Adjust the Vertical Air Flow (Horizontal Vane):

Press the VANE button. Each press cycles the vane angle through 5 positions, then SWING, then AUTO.

5. Adjust the Horizontal Air Flow (Vertical Vane):

Press the WIDE VANE button. Each press cycles the vane through several positions and then a SWING mode.

Note: In DRY mode, the temperature cannot be set. In cooling, if the horizontal vane is set to position 4 or 5 for over an hour, it will automatically move to a horizontal position to prevent condensation from dripping.

LONG OPERATION

This operation makes the air flow reach a longer distance.

• To use: While the unit is operating, press the LONG button. The fan speed increases and the horizontal vane moves to the position for long mode.

• To release: Press the LONG button again. The mode is also released by pressing the VANE button or the ECONO COOL button (during COOL mode).

ECONO COOL OPERATION

This operation, for use in COOL mode, saves energy while maintaining comfort.

• What it is: The unit performs a swing operation with the air flow, which makes you feel cooler than a constant air flow. The set temperature is automatically raised by 2°C, saving energy.

• To use: While in manual COOL mode, press the ECONO COOL button.

• To release: Press the ECONO COOL button again. The mode is also released by pressing the VANE or LONG buttons, or by changing the operation mode.

You can set an ON timer to start the unit and an OFF timer to stop it. The current time must be set on the remote for the timer to function.

How to set the ON timer:

1. Press the START button during operation to enter ON timer mode.

2. Use the HR. and MIN. buttons to set the desired ON time. The HR. button increases the time by 1 hour per press, and the MIN. button increases it by 10 minutes per press.

• To release the ON timer: Press the START button again.

How to set the OFF timer:

1. Press the STOP button during operation to enter OFF timer mode.

2. Use the HR. and MIN. buttons to set the desired OFF time.

• To release the OFF timer: Press the STOP button again.

Note: The ON and OFF timers can be used in combination. The timer that is set to occur first will operate first. If a power failure occurs while a timer is active, the timer setting is cancelled.

Before starting maintenance, always turn off the breaker and/or disconnect the power supply plug.

Cleaning the Indoor Unit:

• Clean the unit with a soft, dry cloth.

• For noticeable dirt, use a cloth soaked in a solution of mild detergent diluted in lukewarm water.

• Do not use gasoline, benzine, thinner, polishing powder, or insecticide.

• When opening the front panel, do not push it past its level position or it may come off. If it does, keep the panel level and re-insert the hinges into the notches at the top of the unit until they click into place.

Cleaning the Air Filter (Catechin) (about once every 2 weeks):

1. Open the front panel and remove the air filter.

2. Remove dirt using a vacuum cleaner, or wash the filter with water. For noticeable dirt, use a mild detergent solution in lukewarm water. Do not use hot water (50°C or more).

3. After washing, dry the filter well in the shade. Do not expose it to direct sunlight or heat from a fire.

4. Re-install the air filter.

Replacing the Air Cleaning Filter (about once every 4 months):

1. Remove the air filter.

2. Remove the old air cleaning filter (White bellows type).

3. Install a new air cleaning filter.

4. Install the air filter and securely close the front panel.

The air cleaning filter (Part number: MAC-1700FT) is disposable. Replace it when its color turns to dark brown.

When preparing for storage:

1. Operate the unit in FAN mode for 3 to 4 hours to dry the inside of the air conditioner. To do this, set the remote to the highest temperature in MANUAL COOL mode (for COOL & HEAT type) or select FAN mode (for COOL ONLY type).

2. Turn off the breaker and/or disconnect the power supply plug. This prevents dirt accumulation which could cause a fire.

3. Remove the batteries from the remote controller to prevent liquid leakage.

When using the unit again:

1. Clean the air filter and install it in the indoor unit.

2. Check that the air inlet and outlet of both the indoor and outdoor units are not blocked.

3. Check that the earth is connected correctly.

If the air conditioner cannot be operated, check the following:

• Is the breaker turned on?

• Is a fuse blown?

• Is the ON timer set?

If the remote controller display is dim, does not appear, or the indoor unit does not respond to its signal, check the following:

• Are the batteries exhausted?

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

• Are buttons on the remote controller of another electronic appliance being pressed?

If the room is not being cooled or heated sufficiently, check these points:

• Is the temperature setting correct?

• Is the air filter clean? A dirty filter can impede airflow.

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

• Is a window or door open?

• In a room where a ventilation fan or a gas cooker is used, the cooling load increases, which can result in insufficient cooling.

• When the outside air temperature is high (for cooling) or low (for heating), the unit’s effect may be reduced.

Various sounds can be normal during operation:

• Cracking sound: This is generated by the expansion and contraction of the front panel due to temperature changes. This is normal.

• Water flowing sound: This is the sound of refrigerant flowing inside the air conditioner or condensed water in the heat exchanger. This is normal.

• Burbling sound: This can be heard when outside air is drawn in through the drain hose, especially if a range hood or ventilation fan is on. This is normal.

• Hissing sound: This is sometimes heard when the flow of refrigerant inside the unit is switched. This is normal.

• Mechanical sound: This is the switching sound of the internal fan or compressor turning on or off. This is normal.

• Unit won’t start for ~3 minutes after restart: This is a protective feature controlled by the microprocessor to prevent damage. Please wait.

• Strange smell from the indoor unit: The unit may absorb odors from walls, carpets, or furniture and then circulate them. Ensure the filter is clean.

• Fan stops during DRY operation: The compressor and fan may stop intermittently to prevent condensed water from re-evaporating and to properly reduce humidity. This is normal.

• Mist discharged from air outlet: Cool air from the unit rapidly cools moisture in the room’s air, which can turn into a visible mist. This is normal.

• Airflow direction changes automatically: In COOL or DRY mode, if air blows down for an hour, it automatically shifts to horizontal to prevent condensation dripping. In HEAT mode, the vane position adjusts based on air temperature.

• No warm air immediately in HEAT mode: The unit needs a few minutes to prepare to blow out warm air. Please wait.

• Operation stops for ~10 minutes in HEAT mode: The unit is performing a defrost cycle on the outdoor unit. This is normal, especially in cold, humid weather.

• White smoke from outdoor unit: In heating operation, vapor generated by the defrosting cycle can look like white smoke. This is normal.