MITSUBISHI ELECTRIC Mitsubishi Home Refrigerator MR-G50J-SS-NZ - Manual (Page 22)

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
is
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
1 , 2 and 3 (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
No
Yes
Yes
Yes
Yes Yes
Yes
No
No
No No
No
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
OA090-1.qxp 06.7.20 9:55 AM Page 22