MachineDown

Cold Rooms & Walk-ins

AL03: Condensing unit lockout

Copeland ZP-54K3E

Safe preliminary checks permitted

Documented meaning

The condensing unit locked out after repeated protection trips.

Model variants covered: see the model record

Documented possible causes

  • · High discharge pressure
  • · Low suction pressure or refrigerant loss
  • · Contactor or overload fault

Safe preliminary checks

  • · Record the lockout time and temperature history

Professional service required

  • · Record the lockout time and temperature history
  • · Do not reset repeatedly - call a refrigeration technician
  • · professional_only

Stop and call a professional if you see

  • · Burning smell, smoke, water on live parts or a tripped protective device
  • · Unusual noise, vibration or a refrigerant leak