Delta VFD-A, User Manual

Page: 63 / 86

59
Fault Name Fault Descriptions Corrective Actions
Internal electronic overload
trip:
Motor is overloaded.
Reduce the current level so
that the drive output current
does not exceed the value set
by the [Motor rated current]
Pr.52.
Check for possible motor overload.
Check electronic thermal overload setting.
Increase motor capacity.
Motor overload. Check the
parameter settings Pr.60, 62.) Reduce the motor load.
Adjust the over-torque detection setting to an
appropriate setting.
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
too small.
Check for possible poor insulation at the output
line.
Decrease the torque boost setting in Pr.-54.
Increase the acceleration time.
Replace with an AC drive with higher output
capacity.
Over-current during
deceleration:
1. Short-circuit at motor
output.
2. Deceleration time too
short.
3. AC drive output capacity
too small.
Check for possible poor insulation at the output
line.
Increase the deceleration time.
Replace with an AC drive with higher output
capacity.
Over-current during steady
state operation:
1. Short-circuit at motor
output.
2. Sudden increase in motor
loading.
3. AC drive output capacity
too small.
Check for possible poor insulation at the output
line.
Check for possible motor stall.
Replace with an AC drive with higher output
capacity.
The external terminal EF-
DCM goes from ON to OFF. External fault.
AC drive internal circuitry
failure. 1. Switch off power supply.
2. Check whether the input voltage falls within
the rated AC drive input voltage.
3. Switch the AC drive back on.