Troubleshooting - Fujitsu Inverter 9319356068 Operating Manual

WARNING

Before requesting service, perform the following checks:

NORMAL

Doesn't operate imme-

diately:

FUNCTION

Noise is heard:

Smells:

Mist or steam is emit-

ted:

AirÀ ow is weak or

stops:

Water is produced

from the outdoor unit:

En-21

9319356068_OM_En.indd 21

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.

Symptom

● 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.

● 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 or immediately after stopping the unit, the sound

of water À 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 refrigerant À owing).

● 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.

● During Heating operation, a sizzling sound may be heard occasional.

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 indoor unit.

● 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.

● 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.

● 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

temperature 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 temperature for a higher setting.

● During Heating operation, the indoor unit will temporarily stop

operation (Max.15 minutes) as the Automatic Defrosting mode op-

erates. During Automatic Defrosting operation, the OPERATION

Indicator Lamp will À ash.

● During Dry mode, the indoor unit will operate at low speed; in or-

der to adjust room humidity, the indoor unit's fan may stop from

time to time. Also, the fan may operate at very low speed when

adjusting room humidity.

● During SUPER QUIET operation, the fan will operate at very low speed.

● In the monitor of AUTO operation, the fan will operate at very low

speed.

● 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 the OPERATION indicator lamp (green) will À ash.

Heating mode and cooling mode (or Dry mode)

Heating mode and fan mode

● During Heating operation, water may be produced from the out-

door unit due to Automatic Defrosting operation.

Problem

See Page

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4/27/2012 1:16:13 PM