Mitsubishi Electric PEFV-P72NMHSU-E Technical & Service Manual page 32

1. Error Code
4255
Position detection error at startup (Indoor unit)
2. Error definition and error detection method
Position error is detected by the hall sensor at inverter startup.
3. Cause, Check method and remedy
(1) Loose connector
(2) Inverter failure or fan motor error
Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter.
(page 47)
1. Error Code
4255
Position detection error during operation (Indoor unit)
2. Error definition and error detection method
Position error is detected by the hall sensor during operation.
3. Cause, Check method and remedy
(1) Loose connector
(2) Inverter failure or fan motor error
Refer to section [8] Troubleshooting, item 3. DC fan motor (fan motor/INV board) for error codes related to the inverter.
(page 47)
HWE1017B
Cause
Cause
- 26 -
Check method and remedy
Check the CNCT1 and CNINV connectors on the
INV board for proper connection.
1) Refer to [8] 3.2.[2].(page 48)
2) Refer to [8] 3.2.[3].(page 49)
Check method and remedy
Check the CNCT1 and CNINV connectors on the
INV board for proper connection.
1) Refer to [8] 3.2.[2].(page 48)
2) Refer to [8] 3.2.[3].(page 49)
26
GB