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Troubleshooting - Fujitsu Inverter Halcyon 9374343072-04 Operating Manual

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Instructions relating to heating (*) are applicable only to "HEAT & COOL MODEL " (Reverse Cycle).
Before requesting service, perform the following checks:
Doesn't operate immedi-
Noise is heard:
Mist or steam are
Airfl ow is weak or stops:
Water is produced from
the outdoor unit:
thermo sensor
display on the remote
controller is fl ashing:
9374343072-04_OM.indb Sec1:12
9374343072-04_OM.indb Sec1:12
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 com-
pletely off.
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 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 fl owing 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 fl owing).
During Heating operation, a sizzling sound may be heard
occasionally. 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, 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 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 opera-
tion (between 4 and 15 minutes) as the Automatic Defrosting
mode operates. During the Automatic Defrosting operation,
The fan may operate at very low speed during Dry operation or
when the unit is monitoring the room's temperature.
In case of Multi-type unit, if multiple units are operated in
different operation modes as shown below, the units operated
afterward will stop and
controller display of the stopped indoor units.
Heating mode and cooling mode (or dry mode)
Heating mode and fan mode
During 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.
The room temperature sensor may be malfunctioning. Please
consult authorized service personnel.
will be shown on the remote controller display.
will be shown on the remote
See Page
9/2/2010 2:59:03 PM
9/2/2010 2:59:03 PM


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