Specifications

5-2
Fault
Name Fault Descriptions Corrective Actions
1. The AC drive detects excessive
drive output current.
Note: The AC drive can withstand up
to 150% of the rated current for
a maximum of 60 seconds.
Internal electronic overload trip
Motor overload. Check the parame-
ter settings (Pr.6-03 to Pr.6-05)
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.
1. Check whether the motor is overloaded.
2. Reduce torque compensation setting as set
in Pr.7-02.
3. Increase the AC drive’s output capacity.
1. Check for possible motor overload.
2. Check electronic thermal overload setting.
3. Increase motor capacity.
4. Reduce the current level so that the drive
output current does not exceed the value set
by the Motor Rated Current Pr.7-00.
1. Reduce the motor load.
2. Adjust the over-torque detection setting to an
appropriate setting (Pr.06-03 to Pr.06-05).
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 out-
put 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 out-
put 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).