25401
Carrier Transicold
Warning

Over Current STP4

Overcurrent detected in the stepper motor 4 (STP4) circuit.

Possible causes

  • Burned out actuator
  • Short circuit in harness
  • Stuck mechanical component
  • Driver chip failure on the board

Recommended actions

  • Test STP4 coil resistance
  • Inspect harness for hot spots
  • Manually move actuator if possible
  • Replace STP4 actuator

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