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8. TROUBLESHOOTING AND SOLUTIONS
Fault Name
Operating
Panel Display
Cause
Possible Solution
User-defined
Fault 1
User-defined fault 1 is input
via DI.
Reset the operation.
User-defined fault 1 is input
via virtual I/O.
Reset the operation.
User-defined
Fault 2
User-defined fault 2 is input
via DI.
Reset the operation.
User-defined fault 2 is input
via virtual I/O.
Reset the operation.
Accumulative
power-on time
reached
Accumulative power-on time
reaches the setting value.
Clear the record through parameter initialization.
Load loss
The output current of AC drive
is lower than F9-64 (load loss
detection level).
Check whether load is disconnected or the
setting of F9-64 and F9-65 (load lost detection
time) satisfies actual running condition.
PID feedback
lost during
running
Feedback loss
PID feedback is smaller than the
setting value of FA- 26 (detection
level of PID feedback loss).
Check PID feedback or set FA-26 properly.
Pulse-by-pulse
current limit
fault
Load is too heavy or locked rotor
occurs on motor.
Reduce load or check motor and mechanical
conditions.
The AC drive power class is
too low.
Replace with a drive of higher power class.
Motor
switchover fault
during running
Motor winding
is damaged
Motor switchover via terminal
during drive running of the AC
drive.
Perform motor switchover after the AC drive
stops.
Speed error
Encoder parameters are set
improperly.
Set encoder parameters properly.
Motor auto-tuning is not
performed.
Perform motor auto-tuning.
F9-69 (detection level of speed
error) and F9-70 (detection time
of speed error) are set incorrectly.
Set F9-69 and F9-70 correctly based
on actual condition.
Motor
overspeed
Problem
Encoder parameters are set
improperly.
Set encoder parameters properly.
Motor auto-tuning is not
performed.
Perform motor auto-tuning.
F9-67 (Overspeed detection level)
and F9-68 (Overspeed detection
time) are set incorrectly.
F9-67 and F9-68 correctly based
on actual condition.
Motor
overtemperature
Cable connection of temperature
sensor becomes loose.
Check cable connection of temperature sensor.
The motor temperature
is too high.
Decrease carrier frequency or take other
measures to cool the motor.
Braking unit
overload
Resistance of braking resistor
is too low.
Replace a braking resistor of higher resistance.
Short-circuit of
braking circuit
Braking module is abnormal.
Contact the agent or Benshaw.