Cold Rooms & Walk-ins
AL03: Condensing unit lockout
Carrier 30XA-250
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