Trouble Shooting - Daikin FUQ71BUV1B Operation Manual

• When the system is changed over to HEATING
OPERATION after DEFROST OPERATION.
Moisture generated by DEFROST becomes
steam and exists.
III. NOISE OF AIR CONDITIONERS
• A ringing sound after the unit is started.
This sound is generated by the temperature regu-
lator working.
It will quiet down after about a minute.
• A continuous flow "Shuh" sound is heard
when the systems is in COOLING or DEFROST
OPERATION.
This is the sound of refrigerant gas flowing
through both indoor and outdoor units.
• A "Shuh" sound which is heard at the start or
immediately after the stop of operation or
which is heard at the start or immediately after
the stop of DEFROST OPERATION.
This is the noise of refrigerant caused by flow stop
and flow change.
• A continuous low "Shah" sound is heard
when the system is in COOLING OPERATION
or at a stop.
The noise is heard when the drain pump is in
operation.
• A "Pishi-pishi" squeaking sound is heard
when the system is in operation or after the
stop of operation.
Expansion and contraction of plastic parts caused
by temperature change makes this noise.
IV. DUST FROM THE UNITS
• Dust may blow out from the unit after starting
operation from long resting time.
Dust absorbed by the unit blows out.
V. THE UNITS GIVE OFF ODORS
The unit absorbs the smell of rooms, furniture,
cigarettes, etc., and then emits them.
VI.THE LIQUID CRYSTAL OF THE REMOTE CON-
TROLLER SHOW "
• It happens immediately after the main power
supply switch is turned on.
This shows that the remote controller is in normal
condition.
This continues temporary.

9. TROUBLE SHOOTING

I. If one of the following malfunctions occurs,
take the measures shown below and contact
your Daikin dealer.
The system must be repaired by a qualified service
person.
9
"
WARNING
When the air conditioner is in abnormal con-
ditions (smell of something burning, etc),
unplug the power cord from the outlet, and
contact your dealer
Continued operation under such circumstances
may result in a failure, electric shock, and fire.
• 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 OPERA-
TION lamp flash and the "MALFUNCTION
CODE" appears.
UNIT No.
C
INDOOR UNIT No. in
INSPECTION
which a malfunction occurs
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.)
Breaker
OPERATION lamp
L H
MALFUNCTION CODE
ON
Switch
Trip position
OFF
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