13
• If the display “ ” (INSPECTION), “UNIT No.”, and the
OPERATION lamp flash and the “MALFUNCTION CODE”
appears.
Measure: Notify your dealer and inform him/her of the
display.
II. If the system does not properly operate except for the
above mentioned case, and none of the above men-
tioned malfunctions is evident, investigate the system
according to the following procedures.
1. If the system does not operate at all.
• Check if there is a power failure.
Wait until power is restored. If power failure occurs dur-
ing operation, the system automatically restarts imme-
diately after the power supply recovers.
• Check if a fuse has blown.
Turn off the power supply.
• Check if the breaker (earth leakage circuit breaker) is
blown.
Turn the power on with the breaker (earth leakage cir-
cuit breaker) switch in the off position.
Do not turn the power on with the breaker (earth leak-
age circuit breaker) switch in the trip position.
(Contact your dealer.)
2. If the system stops operating after operating the
system.
• Check if the air inlet or outlet of outdoor or indoor unit
is blocked by obstacles.
Remove the obstacle and make it well-ventilated.
• Check if the air filter is clogged.
Ask a qualified service person to clean the air filters
(Refer to MAINTENANCE).
3. The system operates but it does not sufficiently cool
or heat.
• If the air inlet or outlet of the indoor or the outdoor unit
is blocked with obstacles.
Remove the obstacle and make it well-ventilated.
• If the air filter is clogged.
Ask a qualified service person to clean the air filters
(Refer to MAINTENANCE).
• If the set temperature is not proper (Refer to ADJUST-
MENT).
• If the FAN SPEED button is set to LOW SPEED (Refer
to ADJUSTMENT).
• If the air flow angle is not proper (Refer to ADJUSTING
THE AIR FLOW DIRECTION).
• If the doors or the windows are open. Shut doors or
windows to prevent wind from coming in.
• If direct sunlight enters the room (when cooling).
Use curtains or blinds.
• When there are too many inhabitants in the room
(when cooling).
Cooling effect decreases if heat gain of the room is too
large.
• If the heat source of the room is excessive (when cool-
ing).
Cooling effect decreases if heat gain of the room is too
large.
C
H
UNIT No.
OPERATION lamp
INDOOR UNIT No. in which a
malfunction occurs
MALFUNCTION
CODE
INSPECTION
display
Breaker
(earth leakage circuit breaker)
ON
OFF
Switch
Trip position
01_EN_3P177429-9S.fm Page 13 Saturday, October 16, 2010 2:24 PM
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