Fujitsu · 410A Multi-Zone Mini-Split Systems
LED 402 flashes nine times, indicating a communication error with the remote controller.
Click steps to track your progress.
Reset the power to the branch box by cycling the circuit breaker.
Check the wiring connections between the remote controller and the branch box for any looseness or damage.
Ensure the remote controller is properly connected and functioning correctly.
If the error persists, the remote controller may need to be replaced by a professional.