Chapter
5
Troubleshooting
28
It is normal that the servo drive reports ERR09 at every power-off. It is
considered as a fault only when ERR09 is reported at power-on.
Snubber circuit board
Disconnect the snubber circuit board from the bus and measure its
resistance. If the measured resistance is larger than 36
Ω
, it indicates that
the snubber circuit board is faulty.
Main circuit contactor
faulty
The main circuit contactor may be in poor contact or may not work. If the
output current of the servo drive is above 070, check the resistance value
when the contactor closes. If the output current of the servo drive is below
070, contact the IMM manufacturer.
Fault Code
ERR10
Fault Principle
Servo drive overload
Perform a pressure holding action with the maximum pressure. View the current during this process
and compare it with 1.5 times of the rated current of the servo drive. If the viewed current is larger
than 1.5 times of the rated current, it indicates that the motor may demagnetize or the encoder
installation angle changes.
Fault Cause
Solution
Encoder installation
angle changing
Perform motor auto-tuning twice and check whether the value of A1-02
(encoder installation angle) changes. If the value changes a lot, contact
Inovance.
You can refer to section 3.4.3 “Setting and Auto-tuning of Motor Parameters”
or the following procedure to perform the motor auto-tuning.
1. Check that the setting of F1-00 to F1-05 is correct.
2. Set A3-00 to 0 and F0-02 to 0, and then perform auto-tuning.
3. Set F1-16 to 1 and press
to start auto-tuning.
This moment "TUNE" is displayed on the operation panel. After
auto-tuning is complete, "TUNE" disappears.
4. Restore the value of A3-00.
5. Start the servo drive again and check whether the alarm persists. If yes,
go to the next step.
Motor encoder fault
Refer to the solution of ERR43.
Motor
demagnetization
Turn on the overflow valve and perform dynamic auto-tuning (same as the
operation for the auto-tuning problem but set F1-16 to 2), and view the back
EMF in F1-15. If the value is lower than 270 V, it indicates that motor
demagnetization occurs. In this case, you need to replace the motor.
Problem of the
pressure sensor
Perform an action with pressure 10 kgf, and check the feedback pressure in
U1-02. If the value of U1-02 remains 0, check wiring of the pressure sensor,
or use a new pressure sensor and connect it correctly. Perform the same
action again. If the value of U1-02 is still 0, measure AI3-GND by using a
multimeter; if the measured value is 0, replace the terminal block of the
servo drive.
Heavy load of the
IMM
If the motor is not demagnetized and the alarm is reported with a long time
interval or periodically, it can be determined that the load of the IMM is too
