Malfunction
Measure
If the system does
NOT operate at all.
•
Check if there is no power failure.
Wait until power is restored. If a
power failure occurs during operation,
the system automatically restarts
immediately after power is restored.
•
Check if the front panel is opened
during operation. Stop operation
and restart the indoor unit using the
remote controller.
•
Check if no fuse has blown or circuit
breaker is activated. Change the fuse or
reset the circuit breaker if necessary.
•
Check the batteries of the remote
controller.
•
Check the timer setting.
The system
suddenly stops
operating.
•
Check if the air inlet or outlet of the
outdoor or indoor unit is NOT blocked
by obstacles. Remove any obstacles
and make sure the air can flow freely.
•
The air conditioner may stop operating
after sudden large voltage fluctuations
to protect the system. It automatically
resumes operation after about 3 minutes.
•
Are operation modes all the same
for indoor units connected to outdoor
units in the multi system?
If not, set all indoor units to the same
operation mode and confirm that the
lamps.
Moreover, when the operation
mode is in AUTO, set all indoor unit
operation modes to COOL or HEAT
for a moment and check again that the
lamps are normal. If the lamps stop
blinking after the above steps, there is
no malfunction. Refer to page 16.
The flaps do NOT start
to swing immediately.
The indoor unit is adjusting the position of
the flaps. The flaps will start moving soon.
Operation does NOT
start soon.
In case the ON/OFF button was pressed
right after operation was stopped or if the
mode was changed. Operation will start
after 3 minutes to protect the system.
Malfunction
Measure
The system
operates,but
cooling or heating is
insufficient.
•
Check the airflow rate setting. Refer to
“4-3-2 Airflow rate” on page 8.
•
Check the temperature setting. Refer to
“4-3-1 To start/stop operation and to set
the temperature” on page 7.
•
Check if the airflow direction setting
is appropriate. Refer to “4-3-3 Airflow
direction” on page 8.
•
Check if the air inlet or outlet of the
outdoor or indoor unit is NOT blocked
by obstacles. Remove any obstacles
and make sure the air can flow freely.
•
Check if the air filters are clogged.
Clean the air filters. See “7.
Maintenance and service” on page 17.
•
Check for open doors or windows.
Close doors and windows to prevent
wind from coming in.
•
Check if the position setting is
appropriate for the installed position
of the unit. Refer to “3-6 To change
indoor unit position setting” on page 6.
•
Check if the unit is operating without
the front panel raised. Refer to “2-1
Indoor unit” on page 3.
•
Check if the unit operates in Econo or
Outdoor unit quiet operation. Refer to
“4-3-6 Econo and Outdoor unit quiet
operation” on page 10.
•
Check if there is any furniture directly
under or next to the indoor unit. Move
the furniture.
The system
operates, but
heating is insufficient
(air is NOT blown
from the unit).
•
To prevent the release of cold air,
air does not come out directly after
operation is started. Please wait 1 to
4 minutes.
•
If a flowing sound is heard, the
outdoor unit may be in defrost
operation. Wait for about 4 to 12
minutes.
The front panel does
NOT open.
Check for the obstacles and try to open the
front panel using the remote controller. Refer
to “7-4 To open the front panel” on page 18.
The ON/OFF timer
does NOT operate
according to the
settings.
•
Check if the Weekly timer and ON/
OFF timer are set to the same time.
Change or deactivate the setting.
Refer to “4-5 OFF/ON timer operation”
on page 11 and “4-6 Weekly timer
operation” on page 12.
•
Check if the clock and the day of the
week are set correctly. Refer to “3-3
Clock” on page 5.
Heating operation
CANNOT be
selected.
Check if the remote controller's jumper
J8 has NOT been cut.
J8
An abnormal
function happens
during operation.
The air conditioner may malfunction
because of lightning or radio waves. Turn
the circuit breaker OFF and back ON.
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