Fujitsu · Air Conditioners
The red LED shows 2 pulses, the green LED blinks, and the yellow LED is off. This indicates an open circuit condition in the air temperature sensor, meaning the sensor is not connected or faulty.
Click steps to track your progress.
Turn off the air conditioner at its power source.
Inspect the air sensor's wiring for any disconnections or physical damage.
Restore power and observe if the error clears.
If the issue persists, a service technician will be needed to replace the sensor or repair the wiring.