Fujitsu AOU18RD User Manual

TROUBLESHOOTING
“ “ in the event of a malfunction (burning smell, etc.), immediately stop operation, disconnect the
WARNING ! Power and consult authorized service personnel.
_ — Merely turning offthe unit's power switch will not completely disconnect the unitfrom the power
source. Always be sure to disconnect the Power Supply Plug and turn off your circuit breaker to
ensure that power is completely off.
Before requesting service, perform the following checks:
Symptom
Problem
See Page
NORMAL
FUNCTION
Doesn't operate immedi¬
ately:
1
• 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 Power is disconnected and then reconnected to a
power outlet, the protection circuit will operate for about 3 min¬
utes, preventing unit operation during that period.
-
Noise is heard:
• 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 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 occa¬
sional. This sound is produced by the Automatic Defrosting op¬
eration.
17
Smells:
• 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.
-
Mist or steam are
emitted:
• 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 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 Automatic
Defrosting operation.
17
Airflow is weak or stops:
• When Heating operation is started, fan speed is temporarily very
low, to allow internal parts to warm up.
-
• During Heating operation, the unit will temporarily stop opera¬
tion (between 7 and 15 minutes) as the Automatic Defrosting mode
operates. During Automatic Defrosting operation, the OPERATION
Indicator Lamp will flash.
17
• The fan may operate at very low speed during Dry operation or
when the unit is monitoring the room's temperature.
7
• During SUPER QUIET operation, the fan will operate at very low speed.
7
• In the monitor AUTO operation, the fan will operate at very low speed.
7
Water is produced from
the outdoor unit:
• During Heating operation, water may be produced from the out¬
door unit due to Automatic Defrosting operation.
17
The outdoor unit does
not stop even when
heating operation is
stopped:
• When there is frost on the outdoor unit when heating operation
is stopped, defrosting will be performed automatically.
At this time, OPERATION Indicator Lamp will flash, and operation
will stop after the outdoor unit has run for several minutes.
En-16

Fujitsu AOU18RD Specifications

General

Brand	Fujitsu
Model	AOU18RD
Category	Air Conditioner
Language	English