Troubleshooting - Fujitsu ART Series Operating Manual

TROUBLESHOOTING

Instructions relating to heating are applicable only to "HEAT & COOL MODEL " (Reverse Cycle).
In the event of a malfunction (burning smell, etc.), immediately stop operation, turn off the electrical 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 turn off the electrical breaker to ensure that power is completely off.
Before requesting service, perform the following checks:
Symptom
NORMAL Doesn't operate immedi-
FUNCTION ately:
Noise is heard:
Smells:
Mist or steam are
emitted:
Air flow is stopped:
Water is produced from
the outdoor unit:
thermo sensor
display on the remote
controller is flashing:
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WARNING!
● If the unit is stopped and then immediately started again, the com-
pressor will not operate for about 3 minutes, in order to prevent
fuse blowouts.
● Whenever the electrical breaker is turned off then on again, the
protection circuit will operate 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 flowing).
● During Heating operation, a sizzling sound may be heard occa-
sionally. This sound is produced by the Automatic Defrosting op-
eration.
● 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, a thin mist may be seen emitted from the indoor
unit. This results from the sudden Cooling of room air by the air
emitted from the air conditioner, resulting 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 Auto-
matic Defrosting operation.
● When Heating operation starts, the fan will not operate or it will
operate at a very low speed to allow the internal parts to warm up.
● During Heating operation, if the room temperature rises above
the thermostat setting, the indoor and the outdoor unit will stop.
If you wish to warm the room further, set the thermostat to a
higher setting.
● During Heating operation, the unit will temporarily stop opera-
tion (between 2 and 16 minutes) as the Automatic Defrosting mode
operates. During the Automatic Defrosting operation,
be shown on the remote controller display.
● The fan may stop or operate at a very low speed when the unit is
monitoring the room's temperature.
● During Heating operation, water may be produced from the out-
door unit due to the Automatic Defrosting operation.
● The room temperature sensor may be malfunctioning. Please
consult authorized service personnel.
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Problem
04.12.2, 14:14
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