
Ver0.1
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CHAPTER 4 TROUBLESHOOTING
4.1
Faults And Solutions
Display
Fault Name
Possible Causes
Solutions
Err02
Overcurrent
during
acceleration
1. The output circuit is short circuited.
2. The acceleration time is too short.
3. Manual torque boost or V/F curve is not
appropriate.
4. The power supply is too low.
5. The startup operation is performed on the rotating
motor.
6. A sudden load is added during acceleration.
7. The AC drive model is of too small power class.
1: Eliminate short circuit.
2: Increase the acceleration time.
3: Adjust the manual torque boost or V/F curve.
4: Check that the power supply is normal.
5: Select rotational speed tracking restart or start the
motor after it stops.
6: Remove the added load.
7: Select a drive of higher power class.
Err03
Overcurrent
during
deceleration
1. The output circuit is short circuited.
2. The deceleration time is too short.
3. The power supply is too low.
4. A sudden load is added during deceleration.
5. The braking resistor is not installed.
1: Eliminate short circuit.
2: Increase the deceleration time.
3: Check the power supply, and ensure it is normal.
4: Remove the added load.
5: Install the braking resistor.
Err04
Overcurrent at
constant speed
1. The output circuit is short circuited.
2. The power supply is too low.
3. A sudden load is added during operation.
4. The AC drive model is of too small power class.
1: Eliminate short circuit.
2: Adjust power supply to normal range.
3: Remove the added load.
4: Select a drive of higher power class.
Err05
Overvoltage
during
acceleration
1. The DC bus voltage is too high
☆
.
2. An external force drives the motor during
acceleration.
3. The acceleration time is too short.
4. The braking resistor is not installed.
1: Replace with a proper braking resistor.
2: Cancel the external force or install a braking
resistor.
3: Increase the acceleration time.
4: Install a braking resistor.
Err06
Overvoltage
during
deceleration
1. The DC bus voltage is too high
☆
.
2. An external force drives the motor during
deceleration.
3. The deceleration time is too short.
4. The braking resistor is not installed.
1: Replace with a proper braking resistor.
2: Cancel the external force or install braking resistor.
3: Increase the deceleration time.
4: Install the braking resistor
Err07
Overvoltage at
constant speed
1. The DC bus voltage is too high
☆
.
2. An external force drives the motor during
deceleration.
1: Replace with a proper braking resistor.
2: Cancel the external force.
☆
:
Voltage thresholds
Voltage Class
DC Bus Overvoltage DC Bus Undervoltage
Braking Unit Operation Level
Single-phase 220 V
400V
200V
381V
Three-phase 220 V
400V
200V
381V
Three-phase 380 V
810V
350V
700V