Fujitsu AIR CONDITIONER DUCT TYPE Operating Manual page 12

TROUBLESHOOTING
Symptom
NORMAL Mist or steam are
FUNCTION emitted:
Airfl ow is weak or stops:
Water is produced from
the outdoor unit:
thermo sensor
display on the remote
controller is fl ashing:
CHECK ONCE Doesn't operate at all:
MORE
Poor Cooling (or *Heating)
performance:
If the problem persists after performing these checks, or if you notice burning smells, stop operation immediately, turn off
electric breaker, and consult with authorized service personnel.
En-11
Problem
l 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.
*l 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.
*l When Heating operation is started, fan speed is temporarily very
low, to allow internal parts to warm up.
* l 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.
*l During Heating operation, the unit will temporarily stop operation
(between 4 and 15 minutes) as the Automatic Defrosting mode
operates. During the Automatic Defrosting operation,
be shown on the remote controller display.
l The fan may operate at very low speed during Dry operation or
when the unit is monitoring the room's temperature.
l 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
l During QUIET operation, the fan will operate at very low speed.
l In the monitor AUTO operation, the fan will operate at very low
speed.
*l During Heating operation, water may be produced from the out-
door unit due to the Automatic Defrosting operation.
l The room temperature sensor may be malfunctioning. Please
consult authorized service personnel.
l Has the circuit breaker been turned off?
l Has there been a power failure?
l Has a fuse blown out, or a circuit breaker been tripped?
l Is the timer operating?
l Is the air fi lter dirty?
l Are the air conditioner's intake grille or outlet port blocked?
l Did you adjust the room temperature settings (thermostat) cor-
rectly?
l Is there a window or door open?
l In the case of Cooling operation, is a window allowing bright
sunlight to enter? (Close the curtains.)
l In the case of Cooling operation, are there heating apparatus
and computers inside the room, or are there too many people
in the room?
l Is the unit set for QUIET operation?
will be shown on the remote
See Page
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