88
Short circuit of
control board
24 V power
Check the wiring between P24 and COM
The interface board is damaged.
Change the interface board and seek for
technical support
Short circuit to
ground fault
One of the phases (most likely the
phase U) is grounding short circuited.
Check the grounding short circuit of the three
phases output and troubleshoot it
Excessive
speed deviation
(DEV) fault
The ASR parameters are improper.
Modify the Group P05 function codes
The speed deviation detection value
is too small.
Modify the speed deviation detection setting
Eliminate the load vibration
The ambient temperature is too high.
Lower the ambient temperature
The motor duct is blocked.
The motor fan is damaged.
The motor runs at low frequency for
a long time with high load.
Add a large fan for the motor to dissipate heat
Temperature
sampling
disconnection
of inverter
module
The temperature sampling circuit is
abnormal.
Seek for technical support
The temperature sampling cable is
disconnected.
Short circuit of
control board
+10 V
Check the wiring of ±10 V
The interface board is damaged.
Change the interface board and seek for
technical support
Internal
overcurrent
baseline
abnormal
The control board is damaged.
Seek for technical support
Undervoltage
during running
The bus voltage is below 420 V.