Daikin FTQ18TAVJUA Operation Manual page 13

• Check if the breaker is 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.)
2. If the system stops operating it has been running
normally.
• Check if the air inlet or outlet of outdoor or indoor unit is
blocked by obstacles. Remove the obstacle so that it is well-
ventilated.
• Check if the air filter is clogged. Ask a qualified service person
to clean the air filters (Refer to HOW TO CLEAN THE AIR
FILTER).
3. If the system operates but it does not sufficiently cool
or heat, check if:
• If the air inlet or outlet of the indoor or the outdoor unit is
blocked with obstacles. Remove the obstacle to ensure it is
well-ventilated.
• If the air filter is clogged. Ask a qualified service person to
clean the air filters (Refer to HOW TO CLEAN THE AIR
FILTER).
• 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 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.
• The heat source of the room is excessive (when cooling).
Cooling effect decreases if heat gain of the room is too large.
English 13