What It Means
Compressor top temperature protection tripped (9k/12k models).
Carrier Ductless Mini-Split
Carrier Ductless Mini-Split Error Code P2
Troubleshooting guide for the Carrier Ductless Mini-Split system fault P2.
Possible Causes
- Low refrigerant charge causing compressor overheating.
- Restricted airflow across condenser coil.
- Excessive compressor discharge temperature.
- Failed outdoor fan motor or top temperature sensor.
Not sure which one it is — or if it's none of these? Try ACLogics today.
Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
New to this code? Click to see why this happens
Full Diagnosis
High Temperature Protection of Compressor Top. High temperature protection of compressor top (9k/12k models only).
All Recorded Causes
Check refrigerant charge level. Inspect for restricted airflow over condenser coil. Check compressor discharge temperature. Verify outdoor fan operation. Inspect compressor top temperature sensor.
Verify Before Replacing Parts
- Confirm the exact Carrier model family and ductless systems context before acting on a generic code description.
- Verify airflow first, then confirm operating pressures and temperature relationship before adjusting charge, since check refrigerant charge level.
- Look for restrictions, iced coils, or dirty heat-transfer surfaces that can mimic a charge problem, and separately confirm inspect for restricted airflow over condenser coil.
- After the correction, run the system long enough to confirm the ductless systems fault does not return under normal load.
Still unsure about this fault?
ACLogics walks you through Carrier Ductless Mini-Split diagnostics step-by-step — so you confirm the cause before swapping parts.
