OCA1: Overcurrent (U-phase arm)

Cause:
Fault on IGBT in U-phase.

Clearing:
Fault in internal inverter. Contact your Toshiba distributor.
Discussion

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.