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MITSUBISHI ELECTRIC Mitsubishi Home Refrigerator MR-G50J-SS-NZ User Manual

Page 21

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21

Inverter-related indication “Compressor does not operate”

Error
code

Abnormality

Possible cause

Symptom

Treatment

e50

•Abnormal start-

up

•Abnormal

synchronization

•Trouble of

overcurrent

detection

•When there is

any trouble in the
circuit which
detects phase
current of com-
pressor.

e51

Compressor
does not
rotate.

Replace the control board.

Bus-bar
voltage is
abnormal.

•Power supply

voltage is
abnormal.

•Defective reactor

on the N/F board

Replace the control board.

e52

e52

display again.

Check the error code by performing the ice making test operation.

Trouble of
inverter circuit

Compressor
does not
rotate.

Arrange
power sup-
ply to obtain
the rated
voltage,
180-280V.

Start

Measure the voltage of

power supply.

160V or

more

280V or more

Does AC230V run
between CN51 ter-
minals

1

and

3

, on

the control board?
(See page 32.)

Arrange power supply to make the voltage
within 180-280V and conduct the following
checks.

Check the
connection
between filter
board and
control board.

Connect

them

properly.

Abno-

rmal

Replace the

filter board.

Yes

Normal

Replace the

control board.

No

Trouble of
inverter software
reset function

•When the inverter

driving software
malfunctions.

Unplug the power cord and then plug it in 10 minutes.

No error code display

Explanation to customer

e53

•Compressor

motor gets locked.

•Defective circuit

on control board

•Defective contact

of CN50G on
control board

•Defective contact

of machine
chamber 6-pin
connector

Compressor
does not
rotate.

Compressor
does not
rotate.

Start

Disconnect 6-pin
connector in
machine cham-
ber to check
resistance
between each
terminal of

1

,

2

and

3

: Are they

approx. 9.3

'

(20

:

)?

Exchange

the unit

Yes

*If control board is normal, compressor is energized

every 10 minutes.
Compressor vibrates at startup when it is being ener-
gized. Touch it with your hand to check.

Measure the
resistance of
compressor’s
winding
between each
terminal of

1

,

2

and

3

: Are

they approx.
9.3

'

(20

:

)?

No

No

Exchange

the unit

*Replace lead wire assembly C.

*Is compressor

energized at
startup?

Check the connection of the
connector CN50G on the
control board or the machine
chamber 6-pin connector.

No

Connect them

properly.

Abnormal

Replace the

control board.

Yes

Yes

Normal

OA090-1.qxp 06.7.20 9:55 AM Page 21