Chapter 8 Maintenance and Troubleshooting
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Fault code Fault Name Possible Causes Solutions
18#
Current
detection fault
1. Check whether the hall device is abnormal.
2. The drive board is abnormal.
1. Replace the hall device.
2. Replace the drive board.
19#
Motor auto-
tuning fault
1. The motor parameters are not set according
to the nameplate.
2. The motor auto-tuning times out.
1. Set the motor parameters correctly
according to the nameplate.
2. Check the cable connecting the AC
drive and the motor.
20# Encoder fault
1. The encoder type is not matching.
2: Wiring of the encoder is incorrect.
3. The encoder is damaged.
4. The PG card is abnormal.
1. Set the encoder type correctly
according to the actual condition.
2. Eliminate the wiring fault.
3. Replace the encoder.
4. Replace the PG card.
23#
Short circuit to
ground
1. The motor is short circuited to ground. 1. Replace the cable or motor.
25#
Power output
phase loss
1. The cable connecting the AC drive and the
motor is abnormal.
The three-phase outputs of the AC drive are
unbalanced during the motor running.
3. The drive board is abnormal.
4. The module is abnormal.
1. Eliminate external faults.
2. Check whether the motor three-phase
winding is normal and eliminate the fault.
3. Contact the agent or Inovance.
4. Contact the agent or Inovance.
37#
Frequency
direction
abnormal
The frequency reference is in the reverse
direction to the feedback frequency of the
motor.
1. Check whether the motor parameters
are set correctly.
2. Check whether the load is too heavy.
3. Adjust the setting of bC.02.
38#
Frequency
following
abnormal
The following error of the frequency reference
and the motor feedback frequency is too large.
1. Check whether the motor parameters
are set correctly.
2. Check whether the load is too heavy.
3. Adjust the setting of bC.03 and bC.04.
40#
Pulse-by-pulse
current limit
fault
1. The load is too heavy or locked-rotor occurs
on the motor.
2. The AC drive size is small.
3. If this fault occurs at start, an output phase
of the AC drive may be lost.
1. Reduce the load and check the motor
and mechanical conditions.
2. Replace a large drive.
3. For details, see the troubleshooting of
the 25# fault.
41#
Brake release
fault
The input of the brake release feedback signal
is incorrect.
For details, see the description of b6.08.
1. Check the brake wiring.
2. Check the function selection (input
function 11) of the brake release
feedback input terminal on the control
board.
42#
Brake apply
fault
The input of the brake apply feedback signal is
incorrect.
For details, see the description of b6.08.
1. Check the brake wiring.
2. Check the function selection (input
function 12) of the brake apply feedback
input terminal on the control board.