MHI · R410A Systems
This error indicates a problem with detecting the position of the compressor, which is essential for proper operation of inverter-driven compressors.
Click steps to track your progress.
Turn off the main power to the outdoor unit at the circuit breaker.
Contact a qualified HVAC technician to inspect the compressor position detection components and their wiring.
The technician will need to diagnose if the sensor, wiring, or inverter control board is at fault.
Repair or replacement of the affected component will be necessary by a professional.