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8
8. TROUBLESHOOTING AND SOLUTIONS
SN
Fault Description
Cause
Possible Solution
8
Motor speed does not
rise in closed-loop
vector control.
Encoder fault
Replace encoder and re-confirm
cable connection.
Encoder connection is incorrect or has
poor contact.
Replace PG card.
PG card is faulty.
Contact the agent or Benshaw.
The drive board is faulty.
9
The AC drive detects
overcurrent and
overvoltage frequently.
Motor parameters are set improperly.
Set motor parameters or perform motor
auto-tuning again.
Acceleration/deceleration time is improper. Set proper acceleration/deceleration time.
Load fluctuates.
Contact the agent or Benshaw.
10
Err17 is detected upon
power-on or running.
The pre-charge relay or contactor
is not closed.
Check whether the relay, contact
or cable is loose.
Check whether the relay or contactor
is faulty.
Check whether 24 V power supply
of contactor is faulty.
Contact the agent or Benshaw.
11
The motor stops freely
or cannot be braked
during deceleration or
deceleration to stop.
The encoder disconnection or overvoltage
stall protection takes effect.
When F0-01 = 1, check whether the
encoder is connected.
If braking resistor is set, set Overvoltage
Stall Enabled to Disabled (F3-23 = 0).
