Mitsubishi PUHY-P72 Air Conditioner User Manual


 
[ IX Troubleshooting ]
- 198 -
HWE09120 GB
1. Error Code
Faulty ACCT wiring (Detail code 120)
2. Error definition and error detection method
Presence of target current cannot be detected during the self-diagnostic operation immediately before startup.
3. Cause, check method and remedy
Refer to section -6- "Inverter (YJMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 261)
5301 (YJMU-A)
Cause Check method and remedy
(1) Inverter output wiring problem Check output wiring connections.
Confirm that the U- and W-phase output cables are put through CT12
and CT22 on the INV board respectively.
(2) Inverter failure Refer to IX [4] -6- (2) [3], [4].(page 263)
(3) Compressor failure Refer to IX [4] -6- (2) [2].(page 263)