Troubleshooting Method - Savch SDA2 Series User Manual

The steps of alarm reset through the additional function mode from the keypad is shown below.

8.3 Troubleshooting Method

(1) Overcurrent
【Display】
【Causes and Solutions】
Causes
Wrong servo motor output wiring
Short circuit or grounding fault in
Servo motor output wiring
Servo motor insulation fault
Failure of servomotor
Incorrect resistance of regenerative
resistor
Current imbalance caused by an
encoder fault
Unconnected grounding cable
[MENU] [SET]
[SET]
[MENU]
End of resetting
【Description of detected alarm】
The output current of the servo motor drive exceeds the rated value.
OC1: Direct detection by internal transistor of servo motor drive.
OC2: Indirect detection with software of servo motor drive.
Solutions
Correct the wiring of power cables (U, V and W).
Check cables visually or through continuity check and replace the
defective cable.
Measure the insulation resistance. (Several MΩ or over to ground)
Measure the resistance across cables. (Several Ω between cables)
Replace with the regenerative resistor within the rating.
Replace the servo motor
Connect the grounding cable
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