Troubleshooting - Fujitsu Inverter Halcyon ASU9RL Operating Manual

TROUBLESHOOTING

WARNING!
Before requesting service, perform the following checks:
Symptom
NORMAL Doesn't operate immedi-
FUNCTION ately:
Noise is heard:
Smells:
Mist or steam is
emitted:
Airflow is weak or stops:
Water is produced from
the outdoor unit:
En-15
In the event of a malfunction (burning smell, etc.), immediately stop operation, turn off breaker,
and consult authorized service personnel.
Merely turning off the indoor 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 ensure that power is completely off.
G If the indoor unit is stopped and then immediately started again,
the compressor will not operate for about 3 minutes, in order to
prevent fuse blowouts.
G Whenever the Power Supply Plug is disconnected and then recon-
nected to a power outlet, the protection circuit will operate for about
3 minutes, preventing unit operation during that period.
G During operation or 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 min-
utes after starting operation (sound of refrigerant flowing).
G During operation, a slight squeaking sound may be heard. This is
the result of minute expansion and contraction of the front panel
due to temperature changes.
G During Heating operation, a sizzling sound may be heard occasional.
This sound is produced by the Automatic Defrosting operation.
G 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 indoor unit.
G During Cooling or Dry operation, a thin mist may be seen emitted
from the indoor unit. This results from the sudden cooling of room
air by the cool air emitted from the indoor unit, resulting in con-
densation and misting.
G During Heating operation, the outdoor unit's fan may stop, and
steam may be seen rising from the unit. This is due to Automatic
Defrosting operation.
G When Heating operation is started, fan speed is temporarily very
low, to allow internal parts to warm up.
G 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 for a higher setting.
G During Heating operation, the indoor unit will temporarily stop
operation (between 7 and 15 minutes) as the Automatic Defrost-
ing mode operates. During Automatic Defrosting operation, the
OPERATION Indicator Lamp will flash.
G The fan may operate at very low speed during Dry operation or
when the unit is monitoring the room's temperature.
G During SUPER QUIET operation, the fan will operate at very low
speed.
G In the monitor of AUTO operation, the fan will operate at very
low speed.
G During Heating operation, water may be produced from the out-
door unit due to Automatic Defrosting operation.
Problem See Page
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