Mitsubishi Electronics MR-G50J-SS-NZ manual Ice gear box 6-pin relay connector, 8-pin relay connec

Display

Self-check LCD

Error code		Trouble		Detecting method		Check point	Treatment	Control
				(*3)
		Trouble of ice		When there is a short or		1. Connector CN7S on control board, 6-pin,	Repair the	•When ice making compart-
		making com-		open circuit in the ice		9-pin relay connector	contact failure.	ment is used as “refrigera-
		partment		making compartment				tor”, synchronize I-damper
e	17	thermistor		thermistor.				with R-damper.
						2. Check the resistance of thermistor.	Replace	•When ice making compart-
								ment is used as “ice mak-
								ing”, synchronize I-damper
								with F-damper.
		Trouble of out-		When there is a short or			Replace the	Compressor is activated at
e	18	side air ther-		open circuit in the out-			operation	“Speed-level 2.”
		mistor		side air thermistor.			P.C. board.
		Trouble of		When defrosting is not		1. Connector CN2A on control board	Repair the	The defrost heater is
		defrost heater		finished in 2 hours.		Defrost heater plug and receptacle, 1-pin	contact failure.	stopped and if the next
		(*6)				relay connector		defrosting finishes in 2
e	30					Thermal fuse 4-pin, 8-pin relay connector		hours, the error code will
						2. Check the resistance of defrost heater.	Replace	disappear .
						3. Check the continuity of thermal fuse.	Replace
		Trouble of refrig-		•When motor doesn’t		1. Connector CN4D on control board,	Repair the	•3 minutes later, the refrigerator
		erator fan motor		rotate even though		Refrigerator fan motor 6-pin relay connector	contact failure.	fan motor is reactivated to be
e	31			power is on.				checked.
				•When the waveform,				•Until the fan motor gets to oper-
				which indicates the rota-			Replace
						2. Check refrigerator fan motor operation.		ate correctly, the buzzer sounds
				tion times of motor, can-
				not be detected.				every time the door is closed.
		Trouble of		•When motor doesn’t		1. Connector CN4D on control board,	Repair the	•3 minutes later, the machine
		machine cham-		rotate even though		4-pin connector, 4-pin relay connector	contact failure.	chamber fan motor is reactivated
e	32			power is on.				to be checked.
		ber fan motor		•When the waveform,				•Until the fan motor gets to oper-
				which indicates the rota-				ate correctly, the buzzer sounds
				tion times of motor, can-		2. Check machine chamber fan motor operation.	Replace
				not be detected.				every time the door is closed.
		Trouble of ice		When the gear box operation		1. Connector CN8K on control board,	Repair the	100 minutes later, the gear box is
		maker gear box		is not finished in 30 seconds.		Ice gear box 6-pin relay connector, 8-pin relay connec-	contact failure.	reactivated to be checked again.
e	33					tor
						2. Ice gear box frozen point	Replace
						3. Check the trouble of the ice gear box with the	Replace
						ice making test operation.
		Clogging of		(T0: Defrost thermistor tem-	Check the compressor and the pipe.			When cooling operation returns to
		refrigerant		perature at power input, T1:				normal condition, the display of
				Defrost thermistor tempera-
e	34	pipe or trouble		ture when 15 minutes have				error code disappears.
				passed from the power input)
		related to		•When the difference
		compressor		between T0 and T1 is
				T0[T1. (*5)
		Trouble of elec-		When defrost thermistor reads		Connector CN9D on control board	Repair the	Check the operation of electro-
e	41	tromagnetic		-10:or above in five minutes		5-pin connector in machine chamber	contact failure.	magnetic three-way valve and
				after the compressor’s
		three-way valve		startup.(*5)				then open the valve.
e		Trouble of invert-		•When there is any trouble in
	50	er circuit	(*6)	the circuit which detects cur-
				rent of compressor.
e	51	Trouble of bus-		•When the range of bus-bar
		bar voltage	(*6)	voltage is not approx. DC
				260-390V.
e	52	Trouble of inverter		•When the inverter driving				The compressor is suspend-
		software reset		software malfunctions.		Refer to “Compressor does not operate” at page 21.		ed and reactivated 10 min-
		function
								utes later.
		Trouble of startup		•When there is no current at
				compressor startup.
		, synchronization		•When phase current exceeds
e	53	or overcurrent		5.5A at compressor startup.
				•When phase current exceeds
		detection		3.3A during compressor oper-
			(*6)	ation.
				•When current of 5.3A or more
				runs into the bus-bar of
				control board.
		Trouble of power		When bus-bar voltage (full		1. Different voltage of power supply outlet	Replace	Refrigerator compartment room
e	54	supply voltage		wave voltage) is DC 390V or			the control	light OFF
								Heaters. OFF
		(*6)		above in power input.		2. Trouble of relay in the circuit on the control board	board.
		Trouble of con-		EEPROM (IC11M)			Replace	When abnormality occurs in
		trol board	(*6)	accumulates data necessary			the control	power input, the compressor
e	55	(EEPROM		for control.			board.	is suspended for 10 minutes.
		related trouble)		•When the data are not input				When abnormality occurs in
				accurately.				normal operation, the com-
				•When microcomputer cannot
				read the data.				pressor keeps operating.
		Defective wiring		The errors 50 to 53 keep				•Error display starts after it is
		continuity or		occurring over one and a half				regarded as e56.
				hour.				•Error display continues until
		trouble of control
				(the situation, which com-				defrosting starts or cooling oper
e	56	board		pressor cannot be operated,		Refer to “Compressor does not operate” at page.22.		ation gets back to normal. (Error
				continues.)				display doesn’t disappear by
				Overcurrent detection error				unplugging and plugging the
				occurred before the				power cord.*7)
				compressor is activated.				•Try to restart compressor every 3
								minutes.

*1 : The setting of ice making compartment will be displayed and blinks during or after ice making test operation.

*2 : This operation is called the recovery operation:

If the damper has not operated ever once during the compressor operation, make the damper operate when the compressor stops. *3 : When the resistance is ∞ ', the circuit is deemed open-circuitted.

When the resistance is 0', the circuit is deemed short-circuitted.

*4 : Once e01 is detected, other errors would be ignored and not displayed on the panel.

*5 : Characteristic value may change in order to improve the product.

*6 : The error codes e50 to e55 are not displayed even if those abnormalities occur at power input.

Therefore, be sure to perform ice making test operation in order to check if any abnormality indicated by these error codes occurs. (See page 14.)

*7 : If those errors still continue for 1minute after the restart, e56 will be displayed again.

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