Mitsubishi MSZ-FD50 VA - Инструкция по эксплуатации - Страница 11

En-9

● OPERATING INSTRUCTIONS ●

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 7 

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-

t i o n s   f r o m   t h e   m i c r o p r o c e s s o r .   P l e a s e 
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 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 position 
(1) to prevent water from condensing and 
dripping.

•  In the heating operation, if the air fl ow tem-

perature is too low or when defrosting is be-
ing done, the horizontal vane is automatically 
set to horizontal position.

The operation is stopped for 
about 10 minutes in the heat-
ing operation.

• Defrosting of the outdoor unit is being 

done.

  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, though it isn’t 
operated with the remote 
controller.

•  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 5 

.

The operation does not stop, 
or air is blown even when the 
ON/OFF button is pressed.

• Is the CLEAN lamp lighted? When the 

CLEAN lamp is lighted, CLEAN operation 
is performed. 

 Page 7 

CLEAN lamp is lighted.

•  CLEAN operation is performed. 

 Page 7 

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.

Multi system

The indoor unit which is not 
operating becomes warm and 
a sound, similar to water fl ow-
ing, is heard from the unit.

•  A small amount of refrigerant continues to 

fl ow into the indoor unit even though it is not 
operating.

When heating operation is 
selected, operation does not 
start right away.

•  When operation is started during defrosting 

of outdoor unit is done, it takes a few minutes 
(max. 10 minutes) to blow out warm air.

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 dur-

ing cooling operation, the fan operates 
intermittently to maintain suffi cient 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 op-

eration makes water frozen on the outdoor 
unit melt and drip down.

Symptom

Explanation & Check points

Outdoor Unit

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 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 or heat

The room cannot be cooled 
or heated suffi ciently.

• Is the temperature setting appropriate? 

 Page 5 

•  Is the fan setting appropriate? Please change 

fan speed to higher setting. 

 Page 6 

•  Is the fi lter 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?

The room cannot be cooled 
suffi ciently.

• 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.

The room cannot be heated 
suffi ciently.

• When the outside temperature is low, the 

heating effect may not be suffi cient.

Air does not blow out soon in 
the heating operation.

•  Please wait as the unit is preparing to blow 

out warm air.

Airfl ow

The air from the indoor unit 
smells strange.

•  Is the fi lter 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.

• During PLASMA operation, you may smell 

ozone that is generated in small quantities 
from the plasma electrode unit. This is not a 
malfunction.

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.

Hissing sound is sometimes 
heard.

•  This is the sound when the fl ow of refrigerant 

inside the unit is switched.

In the following cases, stop using the air conditioner and consult your 
dealer.

•  When water leaks or drips from the indoor unit.
•  When the POWER 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