What can cause an OC3P fault on the ATV21 and ATV212 drives?
Issue:
S-Flex 212 drive is going into 0C3P fault on power up. What can cause this to happen?
Product Line:
Altivar 21, 212, S-flex
Environment:
All
Cause:
Drive is detecting a ground short or a motor short circuit on the output of the drive.
Resolution:
OC3P means you are getting a ground fault. Its a short circuit or ground fault during constant speed operation.
Troubleshooting Tips:
-Try turning off the OPL F605= 0 and running the drive open circuit at 20hz 40hz and 60hz. Using a digital true RMS meter, measure output voltage from the drive (phase to phase) to see if they are balanced at each frequency.
If the drive's output voltages are ok,:
-Try dropping the motor leads and megger out the motor and cables with a 1KV megger.
Check your grounding connections
- Double-check all of your motor parameters settings in the drive. See the article on basic programming for assistance.