Xarios 350 refrigeration system vent dead after going through a service garage.
I have been informed that, battery has been connected wrong way round at the service.
1) Ignition supply fuse is ok.
2) Main fuse next to the battery and the supply to the battery terminal of the processor is ok.
3) Safety switch is bay passed during the check.
4) The cab controller is not lit. No power to the controller.

Considering the above, I have suspected the processer fault and checked the circuit board of the processor but there is no visible burn outs on the board.


Could any one advice of any possible checks or fault.