Daikin FAQ100BUV1B Operation Manual page 11

• If a safety device such as a fuse, a breaker or an
earth leakage breaker frequently actuates;
Measure: Do not turn on the main power switch.
• If the ON/OFF switch does not properly work;
Measure: Turn off the main power switch.
• If water leaks from unit.
Measure: Stop the operation.
• If the display " ", "UNIT No.", and the OPER-
ATION lamp flash and the "MALFUNCTION
CODE" appears.
UNIT No.
C
INSPECTION
display
Measure: Notify your Daikin 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 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 automati-
cally restarts immediately after the power sup-
ply recovers.
• Check if no fuse has blown.
Turn off the power supply.
• 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 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-venti-
lated.
English
OPERATION lamp
L H
INDOOR UNIT
No. in which a
malfunction occurs.
MALFUNCTION
CODE
ON
Switch
Trip position
Breaker
OFF
• 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 suffi-
ciently cool or heat.
• If the air inlet or outlet of the indoor or the out-
door unit is blocked with obstacles.
Remove the obstacle and make it well-venti-
lated.
• 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
ADJUSTMENT).
• 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 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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