Friedrich MW12Y3H, MW09Y3H manual Operating Tips, En-15, Troubleshooting, Symptom, Items to check

TROUBLESHOOTING

	Symptom	Items to check	See Page
CHECK ONCE	Doesn’t operate at all:	● Is the Power Supply Plug disconnected its outlet?
MORE		● Has there been a power failure?	—
		● Has a fuse blown out, or a circuit breaker been tripped?
		● Is the timer operating?	8 - 9
		● Is the Air Filter dirty?
		● Air the air conditioner’s intake grille or outlet port blocked?
	Poor Cooling performance:	● 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?
		● Is the unit set for SUPER QUIET operation?	6
	The unit operates	● Are the Remote Control Unit’s batteries dead?
	differently from the Remote	● Are the Remote Control Unit’s batteries loaded properly?	5
	Control Unit’s setting:

If the problem persists after performing these checks, or if you notice burning smells, or the OPERATION Indicator Lamp (Fig. 3 a-5) and the TIMER Indicator Lamp (Fig. 3 a-6) flashes, immediately stop operation, disconnect the Power Supply Plug, and consult authorized service personnel.

OPERATING TIPS

Operation and Performance

Heating Performance Microcomputer-controlled Automatic Defrosting

●This air conditioner operates on the heat-pump princi- ple, absorbing heat from outdoor air and transferring that heat to indoor unit. As a result, the operating perform- ance is reduced as outdoor air temperature drops. If you feel that insufficient 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 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 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 air conditioner is equipped with a Microcomputer- controlled Automatic Defrosting function. If frost forms, the air conditioner will temporarily stop, and the defrosting circuit will operate briefly (for about 7-15 min- utes).

During Automatic Defrosting operation, the OPERATION Indicator Lamp (green) will flash.

AUTO Restart

In Event of Power Interruption

●The power supply to the air conditioner is stopped by a power interruption. The air conditioner will then restart automatically in its previous mode when the power is restored.

●If a power interruption occurs during TIMER operation, the timer will be reset and the indoor unit will begin (or stop) operation at the new time setting. In the event that this kind of timer fault occurs, the TIMER Indicator Lamp will flash (see Page. 4).

●Use of other electrical appliances (electric shaver, etc.) or nearby use of a wireless radio transmitter may cause the air conditioner to malfunction. In this event, temporarily disconnect the Power Supply Plug, reconnect it, and then use the Remote Control Unit to resume operation.

En-15