Fujitsu ABF18UI-MI Manuale operativo - Pagina 16

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TROUBLESHOOTING

CHECK ONCE

Does not operate at all:

Poor cooling (or heating*)

performance:

The unit operates differ-

e n t l y f r o m t h e R e m o t e

Controller's setting:

If the problem persists after performing these checks, or if you notice burning smells, or the OPERATION indicator lamp and the

TIMER indicator lamp ﬂ ashes, and ECONOMY indicator lamp ﬂ ashes fast. Immediately stop operation, turn off the electrical breaker

and consult authorized service personnel.

OPERATING TIPS

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

Heating Performance*

This air conditioner operates on the heat-pump principle,

●

absorbing heat from outdoor air and transferring that heat

indoors. As a result, the operating performance is reduced

as outdoor air temperature drops. If you feel that insufﬁ cient

heating performance is being produced, we recommend

you use this air conditioner in conjunction with another kind

of heating appliance.

●

Heat-pump air conditioners heat your entire room by recir-

culating air throughout the room, with the result that some

time may be required after ﬁ rst starting the air conditioner

until the room is heated.

When Indoor and Outdoor Temperature are High*

When both indoor and outdoor temperatures are high during

use of the heating mode, the outdoor unit's fan may stop at

times.

The wired remote controller option is required to use the following function (**).

**Dual Remote Controllers (optional)

An additional remote controller can be added up to the maximum of 2 remote controllers. Either remote controller can control the air

conditioner. However, the timer functions cannot be used at the secondary unit.

**Group Control

1 remote controller can control up to 16 air conditioners. All of the air conditioners will be operated with the same settings.

Group control cannot be used when using it by the multi type.

En-16

Symptom

●

Has the circuit breaker been turned off?

●

Has there been a power failure?

Has a fuse blown out, or a circuit breaker been tripped?

●

Is the timer operating?

●

Is the air ﬁ lter dirty?

●

Are the air conditioner's intake grille or outlet port blocked?

Did you adjust the room temperature settings (thermostat)

●

correctly?

Is there a window or door open?

●

In the case of cooling operation, is a window allowing bright

sunlight to enter? (Close the curtains.)

In the case of cooling operation, are there heating apparatus

●

and computers inside the room, or are there too many people

in the room?

●

Is the unit set for QUIET operation?

Are the Remote Controller's batteries dead?

●

Are the Remote Controller's batteries loaded properly?

Problem

Microcomputer-controlled Automatic Defrosting*

When using the heating mode under conditions of low out-

●

door temperature and high humidity, frost may form on the

outdoor unit, resulting in reduced operating performance.

In order to prevent this kind of reduced performance, this

unit is equipped with a microcomputer-controlled automatic

defrosting function. If frost forms, the air conditioner will

temporarily stop, and the defrosting circuit will operate brief-

ly (Max. 15 minutes).

During automatic defrosting operation, the OPERATION

indicator lamp (green) will ﬂ ash.

After heating operation stops, if frost forms on the outdoor

●

unit, the unit will start automatic defrosting operation.

At this time, the outdoor unit will automatically stop after op-

erating for a few minutes.

Low Ambient Cooling*

When the outdoor temperature drops, the outdoor unit's fans

may switch to Low Speed, or one of the fans may stop inter-

mittently.

See page

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