00054
Carrier Transicold
Warning

Defrost Not Complete

The defrost cycle has exceeded the maximum allowed time without completing correctly.

Possible causes

  • Defective defrost termination sensor
  • Failed heat strips or hot gas valve
  • Excessive ice buildup on evaporator
  • Low refrigerant charge

Recommended actions

  • Verify electric heaters or hot gas operation
  • Test coil temperature sensor
  • Visually inspect evaporator for excess ice
  • Check system pressures

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