Daikin FAQ18PVJU Operation Manual page 15

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.
• 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.
13 English