Fujitsu · 410A Multi-Zone Mini-Split Systems
There is an issue with the power supply to the indoor fan motor, possibly due to a voltage drop, electrical noise, or a connection problem.
Click steps to track your progress.
Reset the power to the indoor unit by cycling its circuit breaker.
Check the connection of the indoor fan motor's connector to ensure it is not removed or erroneously connected.
Identify and temporarily disconnect any large electrical load appliances on the same circuit to see if the error clears.
If the error persists, professional service is needed to check the power supply and wiring to the fan motor.