Mitsubishi Electric MS-GF50VA - Инструкция по эксплуатации - Страница 9

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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  instruc-

tions  from  the  microprocessor.  Please 

wait.

The fan stops during the DRY 

operation.

•  In DRY operation, the unit operates using the 

same refrigerant circuit as in COOL opera-

tion. DRY operation time has to be reduced 

in order to lower humidity without much room 

temperature  decreasing.  So  the  compres-

sor sometimes stops, and at the same time 

the  indoor  fan  stops.  This  prevents  water 

condensed  on  the  heat  exchanger  from 

evaporating again.

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 fl ow 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 fl ow is automatically set to horizon-

tal position to prevent water from condensing 

and dripping.

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 4 

The indoor unit discolors over 

time.

•  Although plastic turns yellow due to the infl u-

ence of some factors such as ultraviolet light 

and  temperature,  this  has  no  effect  on  the 

product functions.

Outdoor Unit

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? 

 Page 3 

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

 Page 3 

•  Are any buttons on the remote controller of 

other electric appliances being pressed?

Does not cool

The room cannot be cooled 

suffi ciently.

•  Is  the  temperature  setting  appropriate? 

 Page 4 

•  Is  the  fan  setting  appropriate?  Please 

change fan speed to higher setting. 

 Page 5 

•  Are the fi lters clean? 

 Page 7 

•  Is  the  fan  or  heat  exchanger  of  the  indoor 

unit clean? 

 Page 7 

•  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 insuffi cient cooling effect.

•  When  the  outside  temperature  is  high,  the 

cooling effect may not be suffi cient.

Symptom

Explanation & Check points

Airfl ow

The air from the indoor unit 

smells strange.

•  Are the fi lters clean? 

 Page 7 

•  Is the fan or heat exchanger of the indoor unit 

clean? 

 Page 7 

•  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 fl owing 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 fl owing 

is heard.

•  This is the sound of refrigerant or condensed 

water fl owing in the unit.

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 fl uorescent lamp (inverter-type fl uorescent lamp, etc.) is used.

•  Operation of the air conditioner interferes with radio or TV reception. An ampli-

fi er may be required for the affected device.

•  When an abnormal sound is heard.

W

HEN YOU THINK THAT TROUBLE HAS OCCURRED

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2016/07/01   14:08:06