Chapter 5 Trouble shooting and maintenance
5-12
Motor is overheated
Motor runs unevenly
Is the load or the
current exceeding the
specified value?
Reduce the load
Increase capacities of 7300EV and
the motor
Select the motor again
7300EV fault
Correct bad connection
Clear the deterrence
Bad connection
between7300EV of the motor
Is it running in
low speed for a
long time
?
Are voltages between
even
?
Is there any
deterrence
preventing cooling
the motor?
YES
YES
YES
YES
YES (-3% of output voltage)
NO
NO
NO
Does it happen
when accelerating/
decelerating?
Is the load
floating?
Vibration degree in
transmission parts
such as gears
Is the
acceleration/dec
eleration time
suitable?
Increase the acc/dec time
Reduce the load
Increase capacities of
7300EV and the motor
7300EV faults
•
Reduce the load floating or
add a flywheel
Improve the mechanical system
7300EV Faults
YES (-3% of rated output voltage )
YES
YES
YES
NO
NO
NO
NO
Small
Large
Are output voltages
between
balanced?
No