547
Thermo King
Critical

AC Bus Phase Loss

Indicates a phase loss in the system's alternating current bus.

Possible causes

  • Blown input fuse
  • Defective shore power connection
  • Trouble in AC bus wiring
  • Inverter or rectifier issue

Recommended actions

  • Check voltage of the external power source
  • Inspect high voltage fuses
  • Verify tightness of terminals on the AC bus
  • Measure phase cable continuity

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