[ IX Troubleshooting ]
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HWE1018A GB
1. Error Code
Fan fault
2. Error definition and error detection method
If the auxiliary relay X4 (for fan fault detection) remains unexcited for a certain period of time, the unit will come to an abnormal
stop, and the fan output goes off.
Overcurrent breaker trigger value
3. Cause, check method and remedy
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
4109
Model name, motor output Preset value
PFD
P250 model, 3.7kW 7.5A
P500 model, 5.5kW 12A
Cause Check method and remedy
(1) Overcurrent breaker (51F) is tripped. Check the fan for proper rotation, check for worn bearings, and
check the pulley for proper alignment.
Check for proper belt tension (esp. overtension).
Check the motor for proper operation.
51F malfunction (Test switch is left to ON.)
(2) Blown fuse (F1) Check for a loose or blown fuse
(3) Auxiliary relay (X4) fault Loose, broken, or incorrect lead wire wiring
Coil fault, contact failure
(4) Broken wire Check for broken wire.
(5) Loose connector Check the connector for proper connection.
(6) Indoor unit control board (I.B1, I.B2) fault If no problems are found with the items above and if the problem
persists, circuit board failure is suspected.
4115
Cause Check method and remedy
(1) Power supply error Check the voltage of the power supply terminal
block (TB1).
(2) Noise filter problem
Coil problem
Circuit board failure
Check the coil connections.
Check for coil burnout.
Confirm 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.
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