21100
Carrier Transicold
Critical

No Comm From Any Board to Main Micro

The main microprocessor does not detect communication from any of the system boards.

Possible causes

  • Data bus power failure
  • Short circuit in the CAN line
  • Faulty main microprocessor

Recommended actions

  • Check main switch and power fuses
  • Inspect main communication bus cables
  • Disconnect modules one by one to isolate the short
  • Replace microprocessor if there is no general response

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