Fujitsu ABT54AG Operating Manual - Page 16

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TROUBLESHOOTING

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

CHECK ONCE

Doesn't operate at all:

Poor Cooling (or *Heating)

performance:

The unit operates differ-

ently from the remote con-

trol unit's setting:

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

stop operation immediately, disconnect the power supply, and consult with authorized service personnel.

OPERATING TIPS

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

Operation and Performance

*Heating Performance

G 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 recom-

mend you use this air conditioner in conjunction with

another kind of heating appliance.

G Heat-pump air conditioners heat your entire room by

recirculating air throughout the room, with the result that

some time may be required after first starting the air con-

ditioner until the room is heated.

*When Indoor and Outdoor Temperature are High

G When both indoor and outdoor temperatures are high

during use of the heating mode, the outdoor unit's fan

may stop at times.

Symptom

G Is the power supply plug disconnected from its outlet?

G Has there been a power failure?

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

G Is the timer operating?

G Is the air filter dirty?

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

G Did you adjust the room temperature settings (thermostat) cor-

rectly?

G Is there a window or door open?

G In the case of Cooling operation, is a window allowing bright sun-

light to enter? (Close the curtains.)

G In the case of Cooling operation, are there heating apparatus and

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

room?

G Are the remote control unit's batteries dead?

G Are the remote control unit's batteries loaded properly?

Items to check

*Microcomputer-controlled Automatic Defrosting

G When using the Heating mode under conditions of low

outdoor temperature and high humidity, frost may form

on the outdoor unit, resulting in reduced operating per-

formance.

In order to prevent this kind of reduced performance, this

unit is equipped with a Microcomputer-controlled Auto-

matic Defrosting function. If frost forms, the air condi-

tioner will temporarily stop, and the defrosting circuit will

operate briefly (for about 4 to 15 minutes).

During Automatic Defrosting operation, the OPERATION

indicator lamp (red) will flash.

Low Ambient Cooling

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

fans may switch to Low Speed, or one of the fans may

stop intermittently.

See Page

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9 to 10

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