P00150
Carrier Transicold
Critical

Check SV4 Circuit

Failure in solenoid valve 4 (SV4) circuit.

Possible causes

  • Open or shorted SV4 coil
  • Poor ground connection
  • Internal APX module failure

Recommended actions

  • Measure SV4 coil resistance (approx. 10-20 ohms)
  • Clean J2 connector contacts
  • Replace solenoid

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