Mitsubishi Electronics MR-G50J-SS-NZ Inverter-related indication Compressor does not operate

Inverter-related indication “Compressor does not operate”

Error

Abnormality

Possible cause

Symptom

Treatment

code

e50

Trouble of

•When there is

Compressor

Replace the control board.

inverter circuit

any trouble in the

does not

circuit which

rotate.

detects phase

current of com-

pressor.

Bus-bar

•Power supply

Compressor

e51

Start

voltage is

voltage is

does not

Arrange

abnormal.

abnormal.

rotate.

160V or

power sup-

•Defective reactor

Measure the voltage of

more

ply to obtain

the rated

on the N/F board

power supply.

voltage,

280V or more

180-280V.

Arrange power supply to make the voltage

within 180-280V and conduct the following

checks.

Does AC230V run

Check the

between CN51 ter-

No

connection

Abnormal-

Connect

minals 1 and 3, on

between filter

them

the control board?

board and

properly.

(See page 32.)

control board.

Yes

Normal

Replace the

Replace the

control board.

filter board.

e52

Trouble of

•When the inverter

Compressor

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

inverter software

driving software

does not

reset function

malfunctions.

rotate.

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

e52 display again.

No error code display

Replace the control board.

Explanation to customer

•Abnormal start-

Compressor

e53

•Compressor

Start

up

motor gets locked.

does not

•Defective circuit

rotate.

•Abnormal

Disconnect 6-pin

Measure the

on control board

synchronization

connector in

resistance of

•Defective contact

machine cham-

compressor’s

•Trouble of

of CN50G on

ber to check

No

winding

No

Exchange

overcurrent

control board

resistance

between each

detection

•Defective contact

the unit

between each

terminal of 1,

of machine

terminal of 1, 2

2 and 3: Are

chamber 6-pin

and 3: Are they

they approx.

connector

approx. 9.3'

9.3' (20:)?

(20:)?

Yes

Yes

*Replace lead wire assembly C.

*Is compressor

No

Check the connection of the

Abnormal

energized at

connector CN50G on the

control board or the machine

startup?

chamber 6-pin connector.

Connect them

Yes

Normal

properly.

Exchange

Replace the

the unit

control board.

*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.

21