Fault

W21

Fan 4 alarm.

1 Devices that report this code
T-REX-50KHP3G01Inverter↗ view on device
W21Fan 4 alarm.Fault
Description

Fan 4 stops abnormally, check fan wiring.

Source:T-REX-50KHP3G01-user-manual-.pdf · page 45

Compiled from official FelicityESS user manuals. Always consult your device manual and a qualified technician before performing repairs.