Mitsubishi Electronics MR-G50J-SS-NZ Poor cooling, Control board, Compressor does not operate

￿￿￿

￿￿￿

￿1￿￿ 35￿ 135

￿

CN50G

Poor cooling

[2] Freezer compartment

1Is the set temperature of freezer compartment set to “High”?

Yes

2Does cool air come out of air outlet?

Yes

3Operate the ice-making test at the place where the operation of dampers (Refrigerator compartment and slide compartment ther- mistor) is visible. Does the baffle open / close? (Wait 1 minute for

self-check).

(See “Serf-check and error display method and operation, 1 Ice making test operation” at page 14.)

Normal

4 Check freezer compartment thermistor.

Dip freezer compartment thermistor into ice water (0:), and

No

Set the temperature to “High”.

No

Proceed to “The refrigerator fan motor does not work.”

The baffles

do not Replace the motor damper (for freezer com-

function. partment ).

wReplace the fan grille as well as the motor damper since they are combined together.

Normal	When compressor	Exchange
	operates, LCD indi-	the unit
	cates e41 as a
	result of self-check.

measure the resistance between terminal 3 (white) and 6

(white) by detaching 6-pin connector at the left-back bottom of

vegetable compartment.

•Resistance at 0: :approx. 6~7k".

Defective thermistor

Replace freezer compartment thermistor

Control board

CN7S

44

CN4D

￿￿

￿￿

￿￿

	Freezer
6-pin connector	compartment
￿￿	thermistor
6￿6￿
5￿5￿
4￿4￿
3￿3￿	Motor damper
2￿2￿
11	(for freezer
	M compartment)

Not cooling at all(In case any error codes doesn’t appear as shown in page 21,22 even though mode switch is pressed for 5 seconds)

[3] Compressor does not operate

Is refrigerator in the demonstration mode?

No

Does AC 230V run between 1 and 3, termi- nals of CN1 on filter board?

Yes

Does AC 230V run between 3 and 5, termi- nals of CN2 on filter board?

Yes

Detach each connector CN2A on No
control board check the continuity	continuity
between terminals 5 and 7
respectively.
(Check if there is a short or open
circuit in the motor protector.)

Yes

	Release the demonstration mode. (See page 10.)
No	Inspect power-supply wiring such as power cord and
	breaker etc.
No	Replace the filter board.

Motor protector (open circuit) wBy measuring the resistance,

ensure that the circuit is open.

	Continuity detected	No		Abnormal
Detach connector CN50G on con-			Disconnect 6-pin connector in
		continuity			Normal
trol board and check the resis-			machine chamber to check resis-
						Check connector contact.
tance respectively between termi-			tance between terminals of 1, 2
nals of 1,3 and 5:approx.9.3"			and 3: approx.9.3"

Continuity detected

Check the error display of self- check after turning on and off the power supply.

wWith all the connectors connected.

Inverter-related parts may be

Abnormal

Abnormal

Measure the resistance of com-

pressor’s winding between termi-Exchange the unit nals of black, white, and red :

approx.9.3"

Normal Replace the lead wire assembly (Lead wire of

6-pin connector in machine chamber 1￿1￿compressor) 2￿2￿ M Compressor

defective. Conduct ice making test operation. (see page 21 for error codes.)

￿￿

￿￿

3￿3￿

4￿4￿ Motor 55 protector

￿￿	Filter board	￿￿
CN1		CN2
￿￿		￿￿
￿￿		￿￿
11		11
￿￿	Noise filter	￿￿
33		33

￿￿

57

57

CN2A

Control board

20