Mitsubishi Electric PUHY-HP144TSHMU-A Service Handbook page 143

[ IX Troubleshooting ]
1. Error Code
4115
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) Power supply error
(2) Noise filter problem
Coil (L1 - L3) problem
Circuit board failure
(3) Faulty wiring
(4) Wiring failure
Between noise filter board CN02 and control board
CNAC
(5) Control board failure
1. Error Code
4116
RPM error/Motor error
2. Error definition and error detection method
LOSSNAY
The motor keep running even if the power is OFF.
The thermal overload relay is ON. (Only for the three-phase model)
Indoor 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
(1) Board failure
(2) Motor malfunction
(3) Solenoid switch malfunction
HWE0716A
Cause
Cause
- 134 -
Check method and remedy
Check the voltage of the power supply terminal
block (TB1).
Check the coil connections.
Check for coil burnout.
Confirm that the voltage at the CN02 connector is
188 V or above.
Check fuse F01 on the control board.
Confirm that the voltage at the control board con-
nector CNAC is 188 V or above.
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.
Check method and remedy
Replace the board.
Check for the motor and the solenoid switch.
GB