Daikin FCQ18PVJU Operation Manual page 14

II. If the system does not properly operate
except for the above mentioned case, and
none of the above mentioned 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 during operation, the system auto-
matically restarts immediately after the power
supply recovers.
• Check if a fuse has blown.
Turn off the power supply.
• Is the breaker blown?
Turn the power on with the breaker switch in
the off position.
Do not turn the power on with the breaker
switch in the trip position.
(Contact your dealer.)
Breaker
2. If the system stops operating after operat-
ing 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-venti-
lated.
• Check if the air fi lter is clogged.
Ask a qualifi ed service person to clean the
air fi lters (Refer to MAINTENANCE).
3. The system operates but it does not suffi -
ciently 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-venti-
lated.
• If the air fi lter is clogged.
Ask a qualifi ed service person to clean the
air fi lters (Refer to MAINTENANCE).
• If the set temperature is not proper (Refer to
ADJUSTMENT).
• If the FAN SPEED button is set to LOW
SPEED (Refer to ADJUSTMENT).
• If the air fl ow angle is not proper (Refer to
AIR FLOW DIRECTION ADJUST).
• If the doors or the windows are open. Shut
doors or windows to prevent wind from com-
ing in.
English
ON
Switch
Trip position
OFF
• If direct sunlight enters the room (when cool-
ing).
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 cooling).
Cooling effect decreases if heat gain of the
room is too large.
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