Mitsubishi Electric City Multi PFAV-P500VMH-E, Service Handbook

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[
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Troubleshooting ]
- 115 -
HWE07150 GB
1. Error Code
Power supply signal sync error
2. Error definition and error detection method
The frequency cannot be determined when the power is switched on.
3. Cause, check method and remedy
1. Error Code
RPM error/Motor error
2. Error definition and error detection method
ΠLOSSNAY
∗
The motor keep running even if the power is OFF.
∗
The thermal overload relay is ON. (Only for the three-phase model)
ΠIndoor unit
If detected less than 180rpm or more than 2000rpm, the indoor unit will restart and keep running for 3 minutes.If detected
again, the display will appear.
3. Cause, check method and remedy
4115
Cause Check method and remedy
(1) Power supply error Check the voltage of the power supply terminal
block (TB1).
(2) Noise filter problem
ΠCoil problem
ΠCircuit board failure
ΠCheck the coil connections.
ΠCheck for coil burnout.
ΠConfirm that the voltage at the CN3 connector is
198 V or above.
(3) Faulty wiring Check fuse F01 on the control board.
(4) Wiring failure
Between noise filter CN3 and noise filter CN2 and con-
trol board CNAC
Confirm that the voltage at the control board con-
nector CNAC is 198 V or above.
(5) Control board failure If none of the items described above is applicable,
and if the trouble reappears even after the power is
switched on again, replace the control board.
4116
Cause Check method and remedy
(1) Board failure Replace the board.
(2) Motor malfunction Check for the motor and the solenoid switch.
(3) Solenoid switch malfunction