Fujitsu ABF18UI-MI Manuale operativo - Pagina 15

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TROUBLESHOOTING

Instructions relating to heating (*) are applicable only to "HEAT & COOL MODEL" (Reverse Cycle).

WARNING

Before requesting service, perform the following checks:

NORMAL

Does not operate imme-

FUNCTION

diately:

Noise is heard:

Smells:

Mist or steam are

emitted:

Airﬂ ow is weak or stops:

Water is produced from the

outdoor unit:

The ECONOMY indicator

lamp ﬂ ashing:

In the event of a malfunction (burning smell, etc.), immediately stop operation, disconnect the power

supply plug or turn off the circuit 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 disconnect the power supply plug or turn off your circuit breaker to ensure

that power is completely off.

Symptom

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 power supply plug is disconnected and then

●

reconnected to a power outlet, the protection circuit will oper-

ate 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 ow-

ing).

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 oc-

casionally. This sound is produced by the automatic defrost-

ing 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, result-

ing 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 au-

tomatic 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 op-

eration (Max. 15 minutes) as the automatic defrosting mode

operates. During the automatic defrosting operation, the OP-

ERATION indicator lamp will ﬂ ash.

●

The fan may operate at very low speed during dry operation

or when the unit is monitoring the room's temperature.

During SUPER QUIET operation, the fan will operate at very

●

low speed.

●

In the monitor AUTO operation, the fan will operate at very

low speed.

●

In case of multi-type unit, if multiple units are operated in dif-

ferent operation modes as shown below, the units operated

afterward will stop and the OPERATION indicator lamp (green)

will ﬂ ash.

• Heating mode and cooling mode (or dry mode)

• Heating mode and fan mode

During heating operation, water may be produced from the

●

outdoor unit due to the automatic defrosting operation.

Clean the ﬁ lter. Afterwards, turn the ECONOMY lamp off.

●

Problem

See page

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En-15