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 ON timer set? Page 5
The unit cannot be operated
for about 3minutes when
restarted.
• This protects the unit according to instruc-
tions from the microprocessor. Please
wait.
Mistisdischargedfrom theair
outlet of the indoor unit.
• The cool air from the unit rapidly cools mois-
ture in the airinside the room,and itturns
into mist.
The swing operation of the
HORIZONTALVANE is
suspended for a while, then
restarted.
• This is for the swing operation of the HORI-
ZONTALVANE to be performed normally.
The air flow direction changes
during operation.
The direction of the horizontal
vane cannot be adjusted with
the remote controller.
• In the heating operation, if the air flow tem-
perature is too low or when defrosting is be-
ing done, the horizontal vane is automatically
set to horizontal position.
Theoperationisstoppedfor
about 10minutes in the heat-
ing operation.
• Defrosting of the outdoor unit is being
done.
Since this is completed in max.10minutes,
please wait. (W hen the outside temperature
is too low and humidity is too high, frost is
formed.)
The unit starts operation by
itself when the main power
isturnedon,thoughitisn’t
operated with the remote
controller.
• These models are equipped with an auto re-
start function. W hen 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 which is not
operating becomes warm and
a sound, similar to water flow-
ing, is heard from the unit.
• A small amount of refrigerant continues to
flow into the indoor unit even though it is
not operating.
Outdoor Unit (Multi system)
W henheatingoperationis
selected, operation does not
start right away.
• W henoperationisstartedduringdefrosting
of outdoor unit is done, it takes a few minutes
(max. 10minutes)to blow out warm air.
Thefanoftheoutdoorunit
doesnotrotateeventhough
the compressor is running.
Even if the fan starts to rotate,
it stops soon.
• W hen the outside temperature is low dur-
ing cooling operation, the fan operates
intermittently to maintain sufficient cooling
capacity.
W ater 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.
W hite smoke is discharged
from the outdoor unit.
• In the heating operation,vaporgenerated
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
doesnotrespondtothe
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 sufficiently.
• Is the temperature setting appropriate?
Page 4
• Is the fan setting appropriate? Please
change fan speed to higher setting.
• Is the filter clean? Page 6
• Is the fan or heat exchanger of the indoor unit
clean? Page 6
• 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
sufficiently.
• W hen a ventilation fan or a gas cooker is
used in a room, the cooling load increases,
resulting in an insufficient cooling effect.
• W hen the outside temperature is high,the
cooling effect may not be sufficient.
The room cannot be heated
sufficiently.
• W hen 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
Theairfrom theindoorunit
smells strange.
• Is the filter clean? Page 6
• Is the fan or heat exchanger of the indoor unit
clean? Page 6
• 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 intake grille, etc. due to
change in temperature.
The sound as burbling 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.
Burbling sound is heard from
the indoor unit when DRY/
COOLoperation is stopped.
• This is the sound of drained water flowing
backward in the drain piping in the ceiling.
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.
• Thisisthesoundofrefrigerantorcondensed
water flowing in the unit.
Hissing sound is sometimes
heard.
• This is the sound when the flow of refrigerant
inside the unit is switched.
Thesoundofmotorand
swirling sound is heard from
the indoor unit.
• This is the sound of water condensed during
COOL/DRYoperation being drained from the
indoor unit.
• Sound of water draining may also be heard
from indoor units which are not operating.
(The sound will stop automatically. Please
wait.)
In the following cases, stop using the air conditioner and consult your
dealer.
• W hen water leaks or drips from the indoor unit.
• W hen the upper operation indicator lamp blinks.
• W hen the breaker trips frequently.
• The remote control signal is not received in a room where an electronic ON/OFF
type fluorescent lamp (inverter-type fluorescent lamp, etc.)is used.
• Operation of the air conditioner interferes with radio or TVreception. An ampli-
fier may be required for the affected device.
• W hen an abnormal sound is heard.
WHEN YOU THINK TH AT TRO UBLE HAS OCCURRED
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