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Related Information
Simplified Operations  |  Parameter Setting  |  Monitoring the Operation Status  |  Trip Information and Remedies  |  Connection Equipment  |  Specifications  |  Warranty Registration

OP3: Overvoltage (during constant speed running)

Cause:
1) Input voltage is high or showed an abnormal fluctuation.
2) An external connection was made to one of the following systems:
• Power supply capacity is 500 kVA or more.
• The power factor improvement capacitor was opened/closed.
• Equipment is connected that uses thyristor on the same system.
3) A power supply system is grounded at the other point than neutral point(e.g. when the power supply has delta connection with single phase grounding).
4) The motor was rotated with force on the load side, and it became to regenerative status.

Clearing:
1) Use within the power supply voltage range. When no problem is found in the input voltage, install an input AC reactor (option).
2) Install an input AC reactor (option).
3)Disconnect the grounding capacitor, refer to [2.3.4].
4) Install a braking resistor (option).

Please reference latest AS3 Instruction Manual more details or latest information.

AS3 fault codes, descriptions, symptoms and suggested remedies can be found in the below links. Each fault code can also be linked to directly from the AS3 by accessing the QR code on a mobile device while the AS3 is currently experiencing the fault.

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