9 Troubleshooting NICE3000
new
User Manual
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Table 9-2 Fault codes and troubleshooting
Fault
Code
Name Possible Causes Solution
Level
Err02
Overcurrent
during
acceleration
● The main circuit output
is grounded or short
circuited.
● Motor auto-tuning is
performed improperly.
● The encoder signal is
incorrect.
1. Check the contactors:
● Check whether the RUN contactor at the
controller output side is normal.
● Check whether the shorting PMSM stator
contactor causes short circuit at the
controller output side.
2. Check motor cables:
● Check whether the motor cables have
damaged jacket, possibly short circuited
to ground, and connected securely.
● Check insulation of motor power
terminals, and check whether the motor
winding is short circuited or grounded.
3. Check motor parameters:
● Check whether motor parameters comply
with the nameplate.
● Perform motor auto-tuning again.
4. Check the encoder:
● 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 asynchronous motor,
perform SVC and compare the current
to judge whether the encoder works
properly.
5A
Err03
Overcurrent
during
deceleration
● The main circuit output
is grounded or short
circuited.
● Motor auto-tuning is
performed improperly.
● The deceleration rate is
too short.
● The encoder signal is
incorrect.
5A
Err04
Overcurrent at
constant speed
● The main circuit output
is grounded or short
circuited.
● Motor auto-tuning is
performed properly.
● The encoder is seriously
interfered with.
5A
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