6 Troubleshooting
- 90 -
No.
Fault Symptom
Possible Cause
Solution
6
The motor does
not rotate after the
drive runs.
Check the motor and the motor
cables.
Check that cabling between the AC
drive and the motor is normal.
The motor parameters in group
F1 are set improperly.
Restore the factory parameters and
re-set the following parameters
properly:
Encoder parameters
Motor ratings, such as rated motor
frequency and rated motor speed
F0-01 (1st motor control mode) and
F0-02 (Command source selection)
F3-01 (Torque boost) in V/F control
under heavy-load start
The drive board is faulty.
Contact the agent or Inovance for
technical support.
7
DI terminals are
disabled.
The related parameters are set
incorrectly.
Check and reset the parameters in
group F4 again.
The external signal is incorrect.
Re-connect the external signal
cable.
The jumper across OP and +24 V
becomes loose.
Re-confirm the jumper bar across
OP and +24 V.
The control board is faulty.
Contact the agent or Inovance for
technical support.
8
Motor speed does
not rise in FVC
control.
The encoder is faulty.
Replace encoder and re-confirm
cable connection.
The PG card is faulty.
Contact the agent or Inovance for
technical support.
The drive board is faulty.
9
The drive detects
overcurrent and
overvoltage
frequently.
The motor parameters in group
F1 are set improperly.
Set the motor parameters in group
F1 or perform motor auto-tuning
again.
The acceleration/deceleration
time is improper.
Set proper acceleration/
deceleration time.
The load fluctuates.
Contact the agent or Inovance for
technical support.
10
The drive coasts to
stop or has no DC
injection braking
during deceleration
or deceleration to
stop
Encoder suffers wire-break or
voltage limit function is enabled
(F3-23 = 1).
If the drive is in FVC control (F0-
01 = 1), re-confirm encode cable
connection.
If the braking resistor is installed,
disable voltage limit function (F3-23
= 0).
