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What is the meaning of OC1 fault in Altivar 21 Drive.

FA12151

22/12/2012

The meaning of OC1 is over current during Acceleration. This fault appears when the motor is drawing excess current during acceleration. 

Main probable causes of the fault:
 
1         The acceleration time ACC is too short.
2         The parameter Pt(Motor Control Mode) is incorrect.
3         The drive is starting into a rotating load.
4         A special motor (e.g. motor with small impedance) is used.
 
Remedies:
 
1         Increase the acceleration time
2         Check the Pt (Motor Control Mode) parameter.
3         Use F301 (Auto-Restart) and F302 (Coast Stop).
4         Adjust the switching frequency F300.
5         Set parameter F316(Switching Frequency Control Mode) to 1 or 3 (carrier frequency is decreased automatically).