Possible reasons for fault
Drive’s control
power supply
over voltage
Abnormal AC supply voltage
Check the AC supply voltage
or seek service
Any of phase R, S and T cannot be detected
Check the wiring and
installation
Check the AC supply voltage
Any of Phase U, V and W cannot be detected
Check the drive’s output
wiring
Check the cable and the
motor
Short-circuit among 3-phase output or
line-to-ground short circuit
Rewiring, please make sure
the insulation of motor is
good
Instantaneous over-current
Vent is obstructed or fan does not work
Clean the vent or replace the
fan
Lower the ambient
temperature
Wires or connectors of control board are loose
Current waveform distorted due to output
phase loss
Auxiliary power supply is damaged or IGBT
driving voltage is too low
Short-circuit of IGBT bridge
Control board is abnormal
IGBT module’s
heatsink
overheat
Lower the ambient
temperature
Rectifier’s
heatsink
overheat
Lower the ambient
temperature
Parameters of motor are wrong
Atuo-tune the parameters of
motor
Select the drive with bigger
power
DC injection braking current is too big
Reduce the DC injection
braking current and prolong