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5 Troubleshooting
5
5.2 Fault Codes 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.
Table 5-2 Fault codes and troubleshooting
Fault Code Name Possible Causes Solution Level
Err02
Overcurrent
during
acceleration
The main circuit
output is grounded or
short circuited.
ā¢ Check whether the motor cables and PE
cable are connected incorrectly.
ā¢ Check whether the shorting PMSM stator
contactor causes short circuit at the controller
output side.
ā¢ Check whether the motor cables have
damaged jacket.
5A
Motor auto-tuning is
performed improperly.
Set motor parameters correctly according to
the motor nameplate, and perform motor auto-
tuning again.
The encoder signal is
incorrect.
ā¢ Check whether encoder pulses per revolution
(PPR) is set correctly.
ā¢ 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.
ā¢ 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.
ā¢ Check whether the encoder wirings are
correct. For asynchronous motor, perform
SVC and compare the current to judge
whether the encoder works properly.
The motor phase
sequence is incorrect.
Replace any two of motor UVW cables.
The deceleration rate
is too short.
Reduce the acceleration rate.
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