Eaton MVX9000 Series, User Manual

Page: 129 / 180

Common Problems and Solutions
MVX9000 User Manual 7-3
Tr
oubleshooting and
Fault Information
Table 7-1: Common Problems and Solutions (Continued)
Fault Name Fault Descriptions Corrective Actions
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. 1. Check if the motor is overloaded.
2. Reduce the torque compensation
setting in 60.09.
3. Replace the AC drive with one that has a
higher output capacity (next hp size).
Internal electronic
overload trip 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 (60.01).
Motor overload. Check
the parameter settings
(70.04 through 70.06) 1. Reduce the motor load.
2. 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 is too
small.
1. Check for possible poor insulation at the
output line.
2. Decrease the torque boost setting in
60.09.
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 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).