Delta Electronics AC Drive VFD-F Series User Manual page 110

Fault
Fault Descriptions
Name
OC hardware error
OV hardware error
OH hardware error
Communication Error
Over-current during
acceleration:
1. Short-circuit at motor
output.
2. Torque boost too
high.
3. Acceleration time too
short.
4. AC drive output
capacity is too small.
Over-current during
deceleration:
1. Short-circuit at motor
output.
2. Deceleration time too
short.
3. AC drive output
capacity is too small.
Over-current during
steady state operation:
1. Short-circuit at motor
output.
2. Sudden increase in
motor loading.
3. AC drive output
capacity is too small.
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Corrective Actions
Return to the factory.
Return to the factory.
Return to the factory.
1. Check the connection between the AC
drive and computer for loose wires.
2. Check if the communication protocol is
properly set.
1. Check for possible poor insulation at the
output line.
2. Decrease the torque boost setting in
Pr.7-02.
3. Increase the acceleration time.
4. Replace with the AC drive with one that
has a higher output capacity (next HP
size).
1. Check for possible poor insulation at the
output line.
2. Increase the deceleration time.
3. Replace with the AC drive with one that
has a higher output capacity (next HP
size).
1. Check for possible poor insulation at the
output line.
2. Check for possible motor stall.
3. Replace with the AC drive with one that
has a higher output capacity (next HP
size).
7-3
VFD-F Series
7