Friedrich MW09Y3FM, MW18Y3FM, MW12Y3FM manual Operating Tips, En-14, Troubleshooting

TROUBLESHOOTING

	Symptom	Problem	See Page
NORMAL	Airflow is weak or stops:	● In case of Multi-type unit, if multiple units are operated in differ-
FUNCTION		ent operation modes as shown below, the units operated after-
		ward will stop and the OPERATION indicator lamp (red) will flash.	15
		Heating mode and cooling mode (or dry mode)
		Heating mode and fan mode
	Water is produced from	● During Heating operation, water may be produced from the out-	14
	the outdoor unit:	door unit due to the Automatic Defrosting operation.

	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?	7 - 8
	Poor Cooling performance:	● Is the Air Filter dirty?
		● Air 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?
		● Is the unit set for SUPER QUIET operation?	5
	The unit operates	● Are the Remote Control Unit’s batteries dead?
	differently from the Remote	● Are the Remote Control Unit’s batteries loaded properly?	4
	Control Unit’s setting:

If the problem persists after performing these checks, or if you notice burning smells, or the TIMER Indicator Lamp (Fig. 3 6) and OPERATION Indicator Lamp (Fig. 3 5) flashes, immediately stop operation, disconnect the Power Supply Plug, and con- sult 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 indoors. As a result, the operating performance 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 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 7-15 minutes).

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

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