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6 Troubleshooting and Solutions
6.5 Faults and Diagnostics
Troubleshoot the faults occurring during operating the drive as follows:
Fault Name
Operating
Panel
Display
Cause Possible Solution
Overcurrent
during
acceleration
● Ground fault or short circuit
exists in the output circuit.
● Check whether short-circuit occurs on the motor,
motor cable or contactor.
● Control mode is SVC or FVC
but motor auto-tuning is not
performed.
● Set motor parameters according to motor
nameplate and perform motor auto-tuning.
● Acceleration time is too short. ● Increase acceleration time.
● The overcurrent stall
prevention parameters are
set improperly.
● Ensure that current limit is enabled (F3-19 = 1).
● The setting of current limit level (F3-18) is too
large. Adjust it between 120% and 150%.
● The setting of current limit gain (F3-20) is too
small. Adjust it between 20 and 40.
● Customized torque boost or
V/F curve is not appropriate.
● Adjust the customized torque boost or V/F curve.
● The spinning motor is started.
● Enable the catching a spinning motor function or
start the motor after it stops.
● The AC drive suffers external
interference.
● View historical fault records. If the current value
is far from the overcurrent level, nd interference
source. If external interference does not exist, it
is the drive board or hall device problem.
Overcurrent
during
deceleration
● Ground fault or short circuit
exists in the output circuit.
● Check whether short-circuit occurs on the motor,
motor cable or contactor.
● Control mode is SVC or FVC
but motor auto-tuning is not
performed.
● Set motor parameters according to motor
nameplate and perform motor auto-tuning.
● Deceleration time is too short. ● Increase deceleration time.
● The overcurrent stall
prevention parameters are
set improperly.
● Ensure that current limit is enabled (F3-19 = 1).
● The setting of current limit level (F3-18) is too
large. Adjust it between 120% and 150%.
● The setting of current limit gain (F3-20) is too
small. Adjust it between 20 and 40.
● Braking unit and braking
resistor are not installed.
● Install braking unit and braking resistor.
● The AC drive suffers external
interference.
● View historical fault records. If the current value
is far from the overcurrent level, nd interference
source. If external interference does not exist, it
is the drive board or hall device problem.
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