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Troubleshooting
Fault name
Panel display
Troubleshooting
Countermeasure
Current
detection
fault
Inverter current
sampling abnormal
Check whether the main circuit is
powered on; whether Hall sensor,
or current sampling device is
damaged, and contact the
manufacturer.
Acceleration
overcurrent
Inverter output circuit is
grounded or short
circuited
Eliminate peripheral faults, detect
whether the motor or delay
contactor is short circuited.
The control mode is
FVC or SVC, without
performing
parameter
tuning
Set and tune motor parameters
according to the motor nameplate.
Rapid acceleration, too
short acceleration time
setting
Increase the acceleration time.
Improper overcurrent
stall suppression
setting
Confirm that overcurrent stall
suppression function (F3-19) has
been enabled;
Set value of overcurrent stall action
current (F3-18) is too large, and is
recommended to be adjusted
within the range from 120% to
160%; set value of overcurrent stall
suppression gain (F3-20) is too
small and is recommended to be
adjusted within the range from 20
to 40.
Improper manual
torque magnification or
V/F curve
Adjust the manual torque
magnification or V/F curve.
Start the motor that is
rotating
Select speed tracking startup or
start the motor until it stops.
Fault name
Panel display
Troubleshooting
Countermeasure
Acceleration
overcurrent
Subject to external
interference
Check the history failure record. If
the current value when a failure
occurs is far from the overcurrent
value, find the interference source.
If no other interference source is
found, the driver board or Hall
device might be faulted.
Deceleration
overcurrent
Inverter output circuit is
grounded or short
circuited
Eliminate peripheral faults, detect
whether the motor is short circuited
or the circuit is open.
The control mode is
FVC or SVC, without
performing
parameter
tuning
Set and tune motor parameters
according to the motor nameplate.
Rapid deceleration, too
short deceleration time
setting
Increase the deceleration time.
Improper overcurrent
stall suppression
setting
Confirm that overcurrent stall
suppression function (F3-19) has
been enabled;
Set value of overcurrent stall action
current (F3-18) is too large, and is
recommended to be adjusted
within the range from 120% to
160%; set value of overcurrent stall
suppression gain (F3-20) is too
small and is recommended to be
adjusted within the range from 20
to 40.
No brake unit and brake
resistor are installed
Install brake unit and brake
resistor.
Subject to external
interference
Check the history failure record. If
the current value when a failure
occurs is far from the overcurrent
value, find the interference source.
If no other interference source is
found, the driver board or Hall
device might be faulted.
Constant
speed
overcurrent
Inverter output circuit is
grounded or short
circuited
Eliminate peripheral faults, detect
whether the motor is short circuited
or the circuit is open.
The control mode is
FVC or SVC, without
performing
parameter
tuning
Set and tune motor parameters
according to the motor nameplate.
Improper overcurrent
stall suppression
setting
Confirm that overcurrent stall
suppression function (F3-19) has
been enabled;
Set value of overcurrent stall action
current (F3-18) is too large, and is
recommended to be adjusted
within the range from 120% to
160%; set value of overcurrent stall
suppression gain (F3-20) is too
small and is recommended to be
adjusted within the range from 20
to 40.
In stable operation state, if the
running current exceeds the rated