25 Evaporator Temperature Test Error (Check Alarm)

Thermo King Alarm Code
Description Corrective Action
Evaporator Temperature Test Error (Check Alarm)
  • Occurs during Pretrip (PTI) test only.
  • Evaporator coil temperature too high with no evaporator fans running (above about -15 C [+5 F]).
  • Indicates
  • Evaporator coil sensor is not in contact with evaporator coil
  • Return and evaporator coil sensor connections are interchanged
  • Expansion valve does not open enough or opens too much.
  • Check evaporator coil sensor location.
  • Check evaporator coil sensor and return air sensor connections.
  • Check expansion valve superheat setting.

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