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8.5 FAULTS AND DIAGNOSTICS
Troubleshoot 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 the short-circuit occurs on the
motor, motor cable or contactor.
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 high.
Adjust it between 120% and 150%.
The setting of current limit gain (F3-20) is too low.
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, find 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 the short-circuit occurs on the
motor, motor cable or contactor.
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 high.
Adjust it between 120% and 150%.
The setting of current limit gain (F3-20) is too low.
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, find interference
source. If external interference does not exist, it is
the drive board or hall device problem.
Overcurrent
at constant
speed
Ground fault or short circuit
exists in the output circuit.
Check whether the short-circuit occurs on the
motor, motor cable or contactor.
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 high.
Adjust it between 120% and 150%.
The setting of current limit gain (F3-20) is too low.
Adjust it between 20 and 40.
The AC drive power class
is too low.
If output current exceeds rated motor current or
rated output current of the AC drive during stable
running, replace with a drive of higher power class.
The AC drive suffers external
interference.
View historical fault records. If the current value
is far from the overcurrent level, find interference
source. If external interference does not exist, it is
the drive board or hall device problem.
8. TROUBLESHOOTING AND SOLUTIONS
