Friedrich MR18Y3F, MW18Y3F Error Contents, Self-diagnosisfunction table Flashing LED Display

ERROR CONTENTS

Model : MW18Y3F / MR18Y3F

Self-diagnosis function table (Flashing LED Display)

* Detailed Trouble Display (secondary level) can be indicated by pressing Test Operation button.

Trouble Display (primary)			Detailed Trouble Display (by Test Button)				Detailed Error Item
Error	Operation	Timer	Error	Operation	Timer
Serial signal	Normal	1 sec	Serial reverse signal error	0.1sec	0.5sec		When a signal is not read continuously for 10 secs
error		blinking	at operation start up	blinking	2 times		from power relay ON immediately after operation starts
							>>Cooling 0 code transmission, automatic reset
							When a signal is not read for 20 secs thereafter
							>>Trouble display continues and power relay OFF
							>>Permanent stop
			Signal reverse signal error	0.1sec	0.5sec		When a signal is not read continuously for 10 secs
			during operation	blinking	2 times		from power relay ON immediately after operation starts
							>>Cooling 0 code transmission, automatic reset
							When a signal is not read for 20 secs thereafter
							>>Trouble display continues and power relay OFF
							>>Permanent stop
			Serial forward signal error	0.1sec	0.5 sec		Normal Serial Forward Signal can not be
			at operation start up	blinking	4 times		received more than 10 secs
							>>Releases when it becomes normal
			Serial forward signal error	0.1sec	0.5sec		Normal Serial Forward Signal can not be
			during operation	blinking	5 times		received more than 10 secs ( after receiving
							effective forward transfer signal)
							>>Releases when it becomes normal
Indoor unit	0.5sec	0.1sec	Indoor temperature	0.1sec	0.5sec	Indoor	Thermistor detection value is open when
thermistor	2 times	blinking	thermistor open	blinking	2 times		AC plug is inserted
error
							>>Releases when value becomes normal
			Pipe thermistor	0.1sec	0.5sec	Indoor	Thermistor detection value is open or short
			open or short	blinking	3 times		when AC plug is inserted
							>>Releases when value becomes normal
Outdoor unit	0.5sec	0.1sec	Discharge thermistor	0.1sec	0.5sec	Outdoor	Thermistor detection value is open or short
thermistor	3 times	blinking	open or short	blinking	2 times
error
							>>Outdoor unit stops
							Releases when it becomes normal
			Heat exchanger	0.1sec	0.5sec	Outdoor	Thermistor detection value is open
			thermistor open	blinking	3 times
							>>Outdoor unit stops
							Releases when it becomes normal
			Outdoor temperature	0.1sec	0.5sec	Outdoor	Thermistor detection value is open or short
			thermistor open or short	blinking	4 times
							>>Outdoor unit stops
							Releases when it becomes normal
Indoor unit	0.5sec	0.1sec	Forced automatic SW	0.1sec	0.5sec		Forced Auto SW is ON for more than
control error	4 times	blinking	welded	blinking	2 times	Indoor	10 secs continuously
							>>Error is indicated while it is ON
							Normal Operation other than error indication
			Main relay welded	0.1sec	0.5sec		Serial Reverse Signal is received 1 min.
				blinking	3 times		after Main relay becomes OFF
						Indoor	>>Error is indicated while serial reverse
							signal is input on normal operation
							Normal operation except error indication
			Power interruption error	0.1sec	0.5sec	Indoor	50/60Hz is not detected after 4 secs of
				blinking	4 times		power ON.
							>>Error is indicated and unit is stopped

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