Trouble Shooting; Failures & Failure Elimination - Savch S3100E Series User Manual

AC motor drive is provided with functions of warning and protection such as over voltage, low voltage and over
current. Once fault occurs, protection function shall act, AC motor drive output stop, fault contactor act and also
free running of motor shall stop. For causes and corrective measures of fault, display of fault shall be taken for
reference. The alarm records will be stored into the computer memory of AC motor driver. Attention shall be paid
that RESET key, would be available only after the fault has been eliminated.
6.1 Failures & Failure Elimination
Display Description
Short circuit fault
Overcurrent
during
acceleration
Overcurrent
during
deceleration
Overcurrent at
constant speed
Overvoltage
during
acceleration
Overvoltage
during
deceleration
Possible reason
1. Accelerate too fast.
2. Internal damage of IGBT.
3. Malfunction caused by interference.
4. Whether the grounding is good.
1. Accelerate too fast.
2. The input power voltage is low.
3. The power of the inverter is too small.
4. No parameter learning is performed
during vector control.
5. Manual torque boost or V/f curve is not
suitable.
6. The motor is rotating when starting.
7. There is a short circuit in the inverter
output circuit.
1. Decelerate too fast.
2. Large load inertia torque.
3. The power of the inverter is too small.
4. No parameter learning is performed
during vector control.
5. There is a short circuit in the inverter
output circuit.
1. Abrupt or abnormal load.
2. The input power voltage is low.
3. The power of the inverter is too small.
4. No parameter learning is performed
during vector control.
5. There is a short circuit in the inverter
output circuit.
1. The input voltage is abnormal.
2. After a momentary power failure,
restart the rotating motor.
1. Decelerate too fast.
2. Large load inertia.
3. The input voltage is abnormal.
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6 TROUBLE SHOOTING

corrective-measures
1. Increase acceleration time.
2. Seek support.
3. Check whether the peripheral
equipment has a strong
interference source.
1. Increase the acceleration time.
2. Check the input power.
3. Select a inverter with a higher
power.
4. Perform parameter
self-learning.
5. Adjust manual lifting torque or
V/f curve.
6. Choose speed tracking or start
after the motor stops.
7. Eliminate peripheral faults.
1. Increase the deceleration time.
2. Add appropriate energy
consumption brake components.
3. Select a frequency converter
with a higher power.
4. Perform parameter
self-learning.
5. Eliminate peripheral faults.
1. Check the load or reduce the
sudden change of load.
2. Check the input power.
3. Select a frequency converter
with a higher power.
4. Perform parameter
self-learning.
5. Eliminate peripheral faults.
1. Check the input power.
2. Avoid restarting after stopping.
1. Increase the deceleration time.
2. Increase energy consumption
brake components.
3. Check the input power.