SERVICE MANUAL MR-G57N-T-NZ - B.d.t.
SERVICE MANUAL MR-G57N-T-NZ - B.d.t.
SERVICE MANUAL MR-G57N-T-NZ - B.d.t.
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Inverter-related indication “Compressor does not operate”<br />
Error<br />
code<br />
Abnormality Possible cause Symptom Treatment<br />
E50<br />
E51<br />
E52<br />
E53<br />
Trouble of<br />
inverter circuit<br />
Bus-bar<br />
voltage is<br />
abnormal.<br />
Trouble of<br />
inverter software<br />
reset function<br />
•Abnormal startup<br />
•Abnormal<br />
synchronization<br />
•Trouble of<br />
overcurrent<br />
detection<br />
•When there is<br />
any trouble in the<br />
circuit which<br />
detects phase<br />
current of compressor.<br />
•Power supply<br />
voltage is<br />
abnormal.<br />
•Defective reactor<br />
on the N/F board<br />
•When the inverter<br />
driving software<br />
malfunctions due<br />
to electric noise.<br />
•Compressor<br />
motor gets locked.<br />
•Defective circuit<br />
on control board<br />
•Defective contact<br />
of CN50G on<br />
control board<br />
•Defective contact<br />
of machine<br />
chamber 6-pin<br />
connector<br />
Compressor<br />
does not<br />
rotate.<br />
Compressor<br />
does not<br />
rotate.<br />
Compressor<br />
does not<br />
rotate.<br />
Compressor<br />
does not<br />
rotate.<br />
29<br />
Replace the control board.<br />
Check the error code by performing the ice making test operation.<br />
E52 display again.<br />
Start<br />
Measure the voltage of<br />
power supply.<br />
Does AC 230V run<br />
between CN2A terminals<br />
and , on<br />
the control board?<br />
(See page 40.)<br />
Replace the control board.<br />
253V or more<br />
207V or<br />
more<br />
Arrange<br />
power supply<br />
to obtain<br />
the rated<br />
voltage,<br />
207~253V.<br />
Arrange power supply to make the voltage<br />
within 253V and conduct the following<br />
checks.<br />
No<br />
Check the<br />
connection<br />
between filter<br />
board and<br />
control board.<br />
Yes Normal<br />
Replace the Replace the<br />
control board. filter board.<br />
Abnormal Connect<br />
them<br />
properly.<br />
Unplug the power cord and wait more than 10 minutes then plug it again.<br />
Start<br />
Disconnect 6-pin<br />
connector in<br />
machine chamber<br />
to check resistance<br />
between<br />
each terminal of<br />
, and : Are<br />
they approx. 9.3<br />
(20 )?<br />
Yes<br />
*Is compressor<br />
energized at<br />
startup?<br />
Exchange<br />
the unit.<br />
Measure the<br />
resistance<br />
of compres-<br />
No error code display<br />
Explan to customer<br />
No sor’s winding No<br />
between each<br />
terminal of<br />
, and : Are<br />
they approx. 9.3<br />
(20 )?<br />
Yes<br />
*Replace lead wire assembly C.<br />
No<br />
Check the connection of the<br />
connector CN50G on the<br />
control board or the machine<br />
chamber 6-pin connector.<br />
Yes Normal<br />
Replace the<br />
control board.<br />
*If control board is normal, compressor is energized<br />
every 10 minutes.<br />
Compressor vibrates at startup when it is being energized.<br />
Touch it with your hand to check.<br />
Abnormal<br />
Exchange<br />
the unit.<br />
Connect them<br />
properly.
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