|Alarm meaning||High-pressure sensor trouble (abnormal rise in high pressure) (In some cases this may not be the result of a high-pressure sensor malfunction.)|
1. High-pressure sensor failure
2. Failure to open the service valve, clogged tubing, valve leakage, over-charging.
3. Outdoor unit PCB failure
1. Replace the high-pressure sensor.
2. Replace the PCB.
3. Correct the locations of problems in the refrigeration cycle.
|Example||This alarm may result when the service valve is closed or when valve leakage (particularly from the mechanical valve) occurs.|