Fujitsu ABU30 manual Operating Tips, Operation and Performance, Low Ambient Cooling

TROUBLESHOOTING

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

	Symptom	Items to check	See Page
CHECK ONCE	Doesn’t operate at all:	● Is the power supply plug disconnected from its outlet?
MORE		● Has there been a power failure?	—
		● Has a fuse blown out, or a circuit breaker been tripped?
		● Is the timer operating?	9 to 10
	Poor Cooling (or *Heating)	● Is the air filter dirty?
	performance:	● Is the air conditioner’s intake grille or outlet port blocked?
		● Did you adjust the room temperature settings (thermostat) cor-
		rectly?
		● Is there a window or door open?
		● In the case of Cooling operation, is a window allowing bright sun-	—
		light 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?
	The unit operates differ-	● Are the remote control unit’s batteries dead?
	ently from the remote con-	● Are the remote control unit’s batteries loaded properly?	6
	trol unit’s setting:

If the problem persists after performing these checks, or if you notice burning smells, or the TIMER indicator light 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 *Microcomputer-controlled Automatic Defrosting

●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.

●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 properly heated.

●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 minimize this kind of reduced performance, this unit is equipped with a Microcomputer-controlled Au- tomatic Defrosting function. If excessive frost forms, the air conditioner will temporarily stop, and the defrosting circuit will operate briefly (for about 4 to 15 minutes).

During Automatic Defrosting operation, the OPERATION indicator light (red) will flash.

*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.

Low Ambient Cooling

●When the outdoor temperature drops, the outdoor unit’s one of the fans may stop intermittently.

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