Jaguar AC Varable Drive CDS150 Help

My AC drive has stopped with the code OI according to the manual this is a Instantaneous over current trip Excess current flowing in the IGBT inverter bridge caused by a short circuit ,low impedance ,earth fault or excessive shock load this happens with machinery disconnected so do I take it that the bridge has failed and that I should either send away for repair or replace myself I should add it didn't fail under load

I am familiar with switch power supply's and repairing looking at the board design it seem very similar

Any help

Thanks Andrew Bishop

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Andrew Bishop
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