Troubleshooting - Fujitsu ABBG 45 LRTA Operating Manual

TROUBLESHOOTING

Instructions relating to heating (*) are applicable only to "HEAT & COOL MODEL" (Reverse Cycle).
WARNING
Before requesting service, perform the following checks:
NORMAL Does not operate
FUNCTION immediately:
Noise is heard:
Smells:
Mist or steam are
emitted:
Airflow is weak or stops:
Water is produced from the
outdoor unit:
The ECONOMY indicator
lamp flashing:
In the event of a malfunction (burning smell, etc.), immediately stop operation, disconnect the
power supply plug or turn off the circuit breaker, and consult authorized service personnel.
Merely turning off the unit's power switch will not completely disconnect the unit from the power
source. Always be sure to disconnect the power supply plug or turn off your circuit breaker to en-
sure that power is completely off.
Symptom
● If the unit is stopped and then immediately started again, the
compressor will not operate for about 3 minutes, in order to
prevent fuse blowouts.
● Whenever the power supply plug is disconnected and then
reconnected to a power outlet, the protection circuit will oper-
ate for about 3 minutes, preventing unit operation during that
period.
● During operation and immediately after stopping the unit, the
sound of water flowing in the air conditioner's piping may be
heard. Also, noise may be particularly noticeable for about 2
to 3 minutes after starting operation (sound of coolant flow-
ing).
● During operation, a slight squeaking sound may be heard.
This is the result of minute expansion and contraction of the
front cover due to temperature changes.
* ● During heating operation, a sizzling sound may be heard oc-
casionally. This sound is produced by the automatic defrosting
operation.
● Some smell may be emitted from the indoor unit. This smell is
the result of room smells (furniture, tobacco, etc.) which have
been taken into the air conditioner.
● During cooling or dry operation, a thin mist may be seen emit-
ted from the indoor unit. This results from the sudden cooling
of room air by the air emitted from the air conditioner, result-
ing in condensation and misting.
* ● During heating operation, the outdoor unit's fan may stop, and
steam may be seen rising from the unit. This is due to the au-
tomatic defrosting operation.
* ● When heating operation is started, fan speed is temporarily
very low, to allow internal parts to warm up.
* ● During heating operation, if the room temperature rises above
the thermostat setting, the outdoor unit will stop, and the
indoor unit will operate at very low fan speed. If you wish to
warm the room further, set the thermostat to a higher setting.
* ● During heating operation, the unit will temporarily stop op-
eration (Max. 15 minutes) as the automatic defrosting mode
operates. During the automatic defrosting operation, the OP-
ERATION indicator lamp will flash.
● The fan may operate at very low speed during dry operation
or when the unit is monitoring the room's temperature.
● During SUPER QUIET operation, the fan will operate at very
low speed.
● In the monitor AUTO operation, the fan will operate at very
low speed.
* ● During heating operation, water may be produced from the
outdoor unit due to the automatic defrosting operation.
● Clean the filter. Afterwards, turn the ECONOMY indicator
lamp off.
Problem See page
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