MHI · Air Conditioning
The system has detected that a service valve is closed. Service valves are critical for the proper flow of refrigerant in the system.
Click steps to track your progress.
Power off the air conditioner at the main breaker and wait for 5 minutes before turning it back on.
Verify that all access panels on the outdoor unit are properly secured.
If this error appeared after installation or maintenance, contact a qualified service technician to check the service valve positions.