Sako V780 - Page 66

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7.2 Troubleshooting List
Fault Name Display Possible Causes Solutions
Overcurrent
during
acceleration
Err02
1: The output circuit is grounded
or short circuited.
2: Motor auto-tuning is not
performed.
3: The acceleration time is too
short.
4: Manual torque boost or V/F
curve is not appropriate.
5: The voltage is too low.
6: The startup operation is
performed on the rotating motor.
7: A sudden load is added during
acceleration.
8: The AC drive model is of too
small power class.
1: Eliminate external faults.
2: Perform the motor
autotuning.
3: Increase the
acceleration time.
4: Adjust the manual
torque boost or V/F curve.
5: Adjust the voltage to
normal range.
6: Select rotational speed
tracking restart or start the
motor after it stops.
7: Remove the added load.
8: Select an AC drive of
higher power class.
Overcurrent
during
deceleration
Err03
1: The output circuit is grounded
or short circuited.
2: Motor auto-tuning is not
performed.
3: The deceleration time is too
short.
4: The voltage is too low.
5: A sudden load is added during
deceleration.
6: The braking unit and braking
resistor are not installed.
1: Eliminate external faults.
2: Perform the motor
autotuning.
3: Increase the
deceleration time.
4: Adjust the voltage to
normal range.
5: Remove the added load.
6: Install the braking unit
and braking resistor.
Overcurrent
at constant
speed
Err04
1: The output circuit is grounded
or short circuited.
2: Motor auto-tuning is not
performed.
3: The voltage is too low.
4: A sudden load is added during
operation.
5: The AC drive model is of too
small power class.
1: Eliminate external faults.
2: Perform the motor
autotuning.
3: Adjust the voltage to
normal range.
4: Remove the added load.
5: Select an AC drive of
higher power class.