Mitsubishi Electric PURY-P72 Service Handbook page 234

[ IX Troubleshooting ]
1. Error Code
5301 (THMU-A)
DCCT sensor circuit fault (Detail code118)
2. Error definition and error detection method
When an error value is detected with the DCCT detection circuit just before the inverter starts
3. Cause, check method and remedy
Cause
(1) Contact failure
(2) INV board failure
(3) DCCT sensor failure
(4) Compressor failure
(5) Inverter failure
Refer to section -7- "Inverter (THMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 293)
HWE0803A
(P96 and P120 model only)
Check for good contact of the INV board connector CNCT and the connec-
tor on the DCCT side.
Refer to IX [4] -7- (2) [1], [3], [4].(page 295)
Replace the DCCT sensor.
Refer to IX [4] -7- (2) [2].(page 295)
Refer to IX [4] -7-.(page 293)
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Check method and remedy
GB