P12000
Carrier Transicold
Warning

C3 Chk Supply Air Sensor

Pre-Trip failure in the supply air sensor of compartment 3.

Possible causes

  • Inconsistent reading during self-test
  • Sensor out of calibration
  • High resistance in the wiring

Recommended actions

  • Perform manual sensor diagnostics
  • Verify sensor is not obstructed by cargo
  • Measure wiring harness continuity
  • Replace sensor if Pre-Trip fails repeatedly

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