7 Troubleshooting
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7.4 Fault Information and Troubleshooting
If a fault is reported, the system performs corresponding processing based on the fault level. Handle
the fault according to the possible causes described in the following table.
Fault
Code
Name Possible Causes Solution Level
Err02
Overcurrent
during
acceleration
The main circuit output is
grounded or short circuited.
◆
Check whether the motor and grounding
cables are connected correctly.
◆
Check whether the shorting PMSM stator
contactor causes short circuit at the
controller output side.
◆
Check whether the motor cables have
damaged jacket
5A
Motor auto-tuning is
performed improperly.
◆
Check whether motor parameters comply
with the nameplate. Perform motor auto-
tuning again.
The encoder signal is
incorrect.
◆
Check whether encoder pulses per
revolution (PPR) is set correctly.
◆
Check whether the encoder signal is
interfered with, whether the encoder cable
runs through the duct independently,
whether the cable is too long, and whether
the shield is grounded at one end.
◆
Check whether the encoder is installed
reliably, whether the rotating shaft is
connected to the motor shaft reliably by
observing whether the encoder is stable
during normal-speed running.
◆
Check whether the encoder wirings are
correct. For the asynchronous motor,
perform SVC and compare the current to
judge whether the encoder works properly.
The phase sequence of the
motor is incorrect.
◆
Exchange the motor UVW phase sequence.
The acceleration time is too
short.
◆
Reduce the acceleration rate.
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