euro drive error f860

Hi friends....

I need your help with a problem in one equipment at my work place.... today morning the machine its running fine and all of a sudden the machine stopped and show this error f860 on the servo drive rexroth....

what we can do for fixed

F860 Overcurrent: Short in Powerstage
The current in the power transistor bridge has exceeded the value of the
peak current of the drive by a factor of two. As a result, the drive will be
switched immeediately to torque-free operation. An optional holding
brake is activated immediately.
Cause:
1. Short-circuit in the motor cable.
2. Defective power section in the drive controller.
Remedy:
For 1. Check the motor cable for a short-circuit.
For 2. Exchange the drive controller.

http://www.boschrexroth.ca/country_units/america/united_states/sub_websites/brus_dcc/documentation_downloads/ProductDocumentation/CurrentProducts/Drives/HDS/Firmware/SSE/SSE01/SSE01_WAR1.pdf

Regards,
Garry
http://www.accautomation.ca