Mitsubishi Electric PK-2.5FLA3 [36/48] Cd 4 troubleshooting
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Mitsubishi Electric PK-2.5FLA3 [36/48] Cd 4 troubleshooting

Mitsubishi Electric PK-2.5FLA2 [36/48] Cd 4 troubleshooting
36
4
E
4. Troubleshooting
* Once the unit stops due to a power failure, it will not re-start automatically even if the power is restored. To re-start the unit, press the ON/OFF button of the remote
controller.
If the problem is still present even after the above points have been checked, turn the main switch off and contact the dealer from whom the unit was purchased. Give them the
model name and the nature of the problem. Never try to fix the unit yourself.
The following are not indicative of a malfunction:
Odors:
• Smells, such as tobacco, cosmetics, walls and furniture, contained in the room air have been collected on the air conditioner unit and are discharged.
Sound:
• A swishing sound is sometimes heard during or after operation. This sound is caused by liquid flowing inside the unit.
• A hissing sound is sometimes heard when cooling mode is started and stopped. This sound is caused by shrinking or expansion of the panel due to temperature change.
NOTE: The refrigerant charged in the air conditioner is safe. Refrigerant normally does not leak, however, if refrigerant gas leaks indoors, and comes into contact
with the fire of a fan heater, space heater, stove, etc., harmful substances will be generated.
Be sure to ask the service representative whether there is refrigerant leakage or not when repairs are carried out.
Problem
Unit does not operate.
Unit does not start immediately.
Unit stops soon after starting.
Unit discharges air satisfactorily, but fails
to cool the room well.
Cause
Power failure (See Note*.)
Main power switch is turned off.
Main power fuse has blown.
Earth leakage breaker is activated.
Remote controller is operated outside its
operating range.
Remote controller’s batteries have run out.
(“
” is displayed on the remote control-
ler.)
Re-start prevention circuit is activated caus-
ing the unit to wait three minutes before re-
starting.
Indoor or outdoor unit’s intake or outlet is
obstructed.
Filter is clogged with dust and dirt.
Temperature setting is incorrect.
Filter is clogged with dust and dirt.
Indoor or outdoor unit’s intake or outlet is
obstructed.
Door or window is left open.
Solution
Press the
ON/OFF button after the
power is restored.
Turn main power on.
Replace the fuse.
Reset the earth leakage breaker.
Operate the remote controller within its
operating range.
Replace the batteries with new ones.
Indoor unit is equipped with re-start pre-
vention circuit to protect condenser, thus
condenser may not operate immediately.
In this case, just wait a few minutes. You
may have to wait up to three minutes at
least.
Remove the obstruction.
Clean the filter and resume operation.
See “Cleaning the filters and the indoor
unit” on page 32.
Check the set temperature displayed on
the LCD, then adjust the temperature as
described in “Setting the Temperature”
using the TEMP button.
Clean the filter and resume operation.
See “Cleaning the filters and the indoor
unit” on page 32.
Remove the obstruction.
Close door or window.
Remote controller
No pipping sound is heard nor display
made even if the
ON/OFF button is
pressed.
LCD shows the unit is operating.
LCD shows the unit is operating.
Before requesting repair staff, please check the following points.

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CD 4 Troubleshooting Before requesting repair staff please check the following points Problem Remote controller Unit does not operate No pipping made even Cause sound is heard if ON OFF the nor display button Solution Power failure See Note Press is pressed the ON OFF button after the within its power is restored Main power switch is turned off Turn main power on Main power fuse has blown Replace the fuse Earth leakage breaker is activated Remote controller is Reset the earth leakage breaker operated outside its operating range Remote controller s Operate the remote controller operating range batteries have run out Replace the batteries with new ones C iCçj is displayed on the remote control ler Unit does not start immediately LCD shows the unit is operating Re start prevention circuit is activated caus Indoor unit is equipped with re start pre ing the unit to wait three minutes before re vention starting condenser may not operate i mmedi ately circuit to protect condenser thus In this case just wait a few minutes You may have to wait up to three minutes at least Unit stops soon after starting Indoor or outdoor unit s intake or outlet is Remove the obstruction obstructed Filter is clogged with dust and dirt Clean the See filter Cleaning and the resume filters and operation the indoor unit on page 32 Unit discharges air satisfactorily but fails LCD shows the unit is operating Temperature setting is incorrect Check to cool the room well the set temperature displayed on the LCD then adjust the temperature as described in Setting the Temperature using the TEMP button Filter is clogged with dust and dirt Clean See the filter Cleaning and the resume filters and operation the indoor unit on page 32 Indoor or outdoor unit s intake or outlet is Remove the obstruction obstructed Door or window is left open Close door or window Once the unit stops due to a power failure it will not re start automatically even if the power is restored To re start the unit press the OMOFF button of the remote controller If the problem is still present even after the above points have been checked turn the main switch off and contact the dealer from whom the unit was purchased Give them the model name and the nature of the problem Never try to fix the unit yourself The following are not indicative of a malfunction Odors Smells such as tobacco cosmetics walls and furniture contained in the room air have been collected on the air conditioner unit and are discharged Sound A swishing sound is sometimes heard during or after operation This sound is caused by liquid flowing inside the unit A hissing sound is sometimes heard when cooling mode is started and stopped This sound is caused by shrinking or expansion of the panel due to temperature change NOTE The refrigerant cha rged in the air conditioner is safe Refrigerant normally does not with the tire of a fan heater space heater stove etc harmful substances will be generated Be sure to ask the service representative whether there is refrigerant leakage or not when repairs are carried out 36 leak however if refrigerant gas leaks indoors and comes into contact

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