En-13
● 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 9
The horizontal vane does not
move.
• Are the horizontal vane and the vertical vane
installed correctly?
• Is the fan guard deformed?
The unit cannot be operated
for about 3 minutes when
restarted.
• This protects the unit according to instruc-
tions from the microprocessor. Please 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 / VERTICAL
VANE is suspended for a
while, then restarted.
• This is for the swing operation of the HORI-
ZONTAL / VERTICAL 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 upward
position 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 stops for about
10 minutes in the heating
operation.
<MSZ (Heat pump)>
• Outdoor unit is in defrost.
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 11
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
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 during
cooling operation, the fan operates intermit-
tently 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
operation makes ice forming on the outdoor
unit melt and drip down.
White smoke is discharged
from the outdoor unit.
<MSZ (Heat pump)>
• 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 4
• Is the polarity (+, -) of the batteries correct?
Page 4
• Are any buttons on the remote controller of
other electric appliances being pressed?
Symptom Explanation & Check points
Does not cool or heat
The room cannot be cooled
or heated suffi ciently.
• Is the temperature setting appropriate?
Pages 5, 6
• Is the fan setting appropriate? Please change
fan speed to High or Super High. Page 7
• Are the fi lters clean? Page 12
• Is the fan or heat exchanger of the indoor unit
clean?
• 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.
• It may take a certain time to reach the setting
temperature or may not reach that depending
on the size of the room, the ambient tempera-
ture, and the like.
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.
• Are the fi lters clean? Page 12
• Is the fan or heat exchanger of the indoor unit
clean?
• 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.
Hissing sound is sometimes
heard.
• This is the sound when the fl ow of refrigerant
inside the unit is switched.
Timer
Weekly timer does not operate
according to settings.
• Is the ON/OFF timer set? Pages 9, 10
• Transmit the setting information of the weekly timer
to the indoor unit again. When the information is
successfully received, a long beep will sound from
the indoor unit. If information fails to be received,
3 short beeps will be heard. Ensure information is
successfully received. Pages 9, 10
• When a power failure occurs and the main power
turns off, the indoor unit built-in clock will be
incorrect. As a result, the weekly timer may not
work normally.
Be sure to place the remote controller where
the signal can be received by the indoor unit.
Page 3
The unit starts/stops the opera-
tion by itself.
• Is the weekly timer set? Pages 9, 10
WHEN YOU THINK THAT TROUBLE HAS OCCURRED
DG79A05BH01_01En.indd 13 2022/02/17 14:26:41