Fujitsu · 410A Multi-Zone Mini-Split Systems
The compressor speed is not synchronizing with the control signal, or the compressor failed to start.
Click steps to track your progress.
Reset the power to the unit by turning it off at the circuit breaker, waiting 30 seconds, then turning it back on.
Ensure that any manual valves on the refrigerant lines (if accessible) are fully open.
If the error persists, professional service is needed to inspect the compressor and refrigeration cycle.