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

Page 22

Inverter-related indication “Compressor does not operate”

Error
code

Abnormality

Possible cause

Symptom

Treatment

e56

(1) or (2)
(1)Compres

sor can

not be

activeted

for more

than 1.5

hours

(2)Overcurr

ent

detection

error

occurred

before

the com-

presssor

actived.

1.Locate the trouble and deside the treatment

•Decide the treatment by checking the followings.
(1) Defective connector connections.

(board-side,relay,comp-side)

(2) Resistance of compressor’s winding

2.Flowchart of troubleshooting

•Defective wiring

continuity

•Trouble of the

control board

•Defective connec-

tion of connectors
related to com-
pressor

(board-side,relay,

comp-side)

•Defective wiring

continuity of the
compressor

•Trouble of control

board

•Trouble of

compressor

3.Recheck after treatment

•After any treatment is tried, unplug and plug power cord

again to check if the compressor operates properly.

•If the compressor can operate properly for more than 1

minute after power cord is plugged again, it’s presumed
that the couse of trouble is eliminated.

*If the couse of trouble cannot be eliminated,”

e56

” will be

displayed again 1 minute later after the power cord is
plugged again.

*If the control board has been replaced,

e56

won’t be dis-

played even though the couse of trouble is still not elimi-
nated. In such a case,perform the ice making test opera-
tion to check what the error is. At the same time, also con-
firm that the compressor is operating for more than 3 min-
utes and each compartment is getting cooled.

start

Connector CN50G on the
control board is properly
connected?

6-pin relay connector in machine
chamber is properly connected?

The connector of compressor
is properly connected?

Disconnect 6-pin relay
connector in machine
chamber and measure
the resistance
between each terminal
of

and

(Pont 1).

Approx.
9.3

(At 20

Is compressor being
energized at startup?

Exchange the unit

Connect properly.

Measure the
resistance of
compressor’s
winding
between each
terminal
(Point 2).
Approx.9.3

(At20

Exchange
the unit

Replace the lead wire connected to compressor.

Replace the control board.

Replace it only when error display
keeps blinking even though all the
above mentioned connectors are
properly connected.

Check

Yes

Treatment

Compressor

6-pin relay connector in machine chamber

Control board

Point+2 (to measure resistance)

Point+1 (to measure resistance)

For checking the connection
to compressor

For checking the relay
connection

Lead wires connected
to compressor

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