Chapter 8 Maintenance and Troubleshooting
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Table 8-2 Fault codes and troubleshooting
Fault code Fault Name Possible Causes Solutions
02#
Overcurrent
during
acceleration
1. The output circuit is grounded or short
circuited.
2. The control mode is vector control but motor
auto-tuning is not performed.
3. The acceleration time is too short.
4. The customized torque boost or the V/F
curve is improper.
5. The voltage is too low.
6. The spinning motor is started.
7. A sudden load is added during acceleration.
8. The AC drive size is small.
1. Eliminate external faults.
2. Perform the motor auto-tuning.
3. Increase the acceleration time.
4. Adjust the customized torque boost or
the V/F curve.
5. Adjust the voltage to normal range.
6. Enable the catching a spinning motor
function or start the motor after it stops.
7. Remove the added load.
8. Replace a large drive.
03#
Overcurrent
during
deceleration
1. The output circuit is grounded or short-
circuited.
2. The control mode is vector control but motor
auto-tuning is not performed.
3. The deceleration time is too short.
4. The voltage is too low.
5. A sudden load is added during deceleration.
6. The braking unit and braking resistor are not
installed.
1. Eliminate external faults.
2. Perform the motor auto-tuning.
3. Increase the deceleration time.
4. Adjust the voltage to normal range.
5. Remove the added load.
Install the braking unit and braking
resistor.
04#
Overcurrent at
constant speed
1. The output circuit is grounded or short-
circuited.
2. The control mode is vector control but motor
auto-tuning is not performed.
3. The voltage is too low.
4. A sudden load is added during running.
5. The AC drive size is small.
1. Eliminate external faults.
2. Perform the motor auto-tuning.
3. Adjust the voltage to normal range.
4. Remove the added load.
5. Replace a large drive.
05#
Overvoltage
during
acceleration
1. The input voltage is too high.
2. An external force drives the motor during
acceleration.
3. The acceleration time is too short.
4. The braking unit and braking resistor are not
installed.
1. Adjust the voltage to normal range.
2. Cancel the external force or install a
braking resistor.
3. Increase the acceleration time.
4. Install the braking unit and braking
resistor.
06#
Overvoltage at
constant speed
1. The input voltage is too high.
2. An external force drives the motor during
deceleration.
3. The deceleration time is too short.
4. The braking unit and braking resistor are not
installed.
1. Adjust the voltage to normal range.
2. Cancel the external force or install a
braking resistor.
3. Increase the deceleration time.
4. Install the braking unit and braking
resistor.