Over-current during
deceleration
Increase deceleration time
Too-heavy and large-inertia load
Replace with higher-rating
controller
Over-current at
constant running
speed
Check the input power
supply or wiring
Replace with higher-rating
controller
Over-voltage during
acceleration
Restart the motor when
instantaneous trip-off occurs
Avoid prompt restart when
trip-off
Over-voltage during
deceleration
Check input power supply or
wiring
Over-voltage at
constant running
speed
Install proper input AC
reactor
Check input power supply or
wiring
Increase deceleration time
Check input power supply or
wiring
Increase acceleration time
Restart the motor when
instantaneous trip-off occurs
Avoid prompt restart when
trip-off