Delta VFD110B23A

7
VFD-B Series
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
7-3
Fault
Name
Fault Descriptions
Corrective Actions
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.
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 the AC drive with one that has a
higher output capacity (next HP size).
Over-current during
deceleration:
1. Short-circuit at motor
output.
2. Deceleration time too
short.
3. AC drive output
capacity is too small.
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).
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.
1. Check for possible poor insulation at the
output line.
2. Check for possible motor stall.
3. Replace the AC drive with one that has a
higher output capacity (next HP size).
The external terminal
EF-GND goes from OFF
to ON.
1. When external terminal EF-GND is
closed, the output will be turned off.
(Under N.O. E.F.)
2. Press RESET after fault has been
cleared.