Delta VFD004L11A User Manual page 75

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Fault
Name
Over-current during
acceleration:
1. Short-circuit at motor
2. Torque boost too
3. Acceleration time too
4. AC drive output
Over-current during
deceleration:
1. Short-circuit at motor
2. Deceleration time too
3. AC drive output
Over-current during
steady state operation:
1. Short-circuit at motor
2. Sudden increase in
3. AC drive output
The external terminal
EF-GND goes from OFF
to ON.
Internal memory IC can
not be programmed.
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Fault Descriptions
output.
high.
short.
capacity is too small.
output.
short.
capacity is too small.
output.
motor loading.
capacity is too small.
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Corrective Actions
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).
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 the AC drive with one that has a
higher output capacity (next HP size).
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.
1. Return to the factory.
2. Check the EEPROM on the control
board.
7-3
VFD-L Series
7