Mitsubishi Electric CMB-WP108NU-AA Service Handbook page 118

[ VIII Troubleshooting ]
1. Error Code
5301
DCCT sensor fault (Detail code 116)
2. Error definition and error detection method
When the bus current less than 18 Apeak is detected at startup (6Hz)
3. Cause, check method and remedy
Cause
(1) Contact failure
(2) Misorientation
(3) DCCT sensor failure
(4) INV board failure
Refer to the page on troubleshooting of inverter in outdoor unit service handbook.
1. Error Code
5301
ACCT sensor circuit fault (Detail code 117)
2. Error definition and error detection method
When an error value is detected with the ACCT detection circuit just before the inverter starts
3. Cause, check method and remedy
Cause
(1) INV board failure
(2) Compressor failure
Refer to the page on troubleshooting of inverter in outdoor unit service handbook.
HWE2206A
Check method and remedy
Check the connector CNCT on the INV board and the DCCT-side
connectors for proper contact.
Check the installation direction of DCCT sensor.
Replace the DCCT sensor.
If the problem recurs when the unit is put into operation, replace
the INV board.
Check method and remedy
Refer to the page on troubleshooting of inverter in outdoor unit ser-
vice handbook
Refer to the page on troubleshooting of inverter in outdoor unit ser-
vice handbook
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