Fujitsu · Air Conditioners
The red LED shows 2 pulses, the green LED blinks, and the yellow LED blinks. This indicates a closed circuit (short circuit) condition in the air temperature sensor, which means the sensor is incorrectly connected or damaged.
Click steps to track your progress.
Turn off the air conditioner at the circuit breaker.
Visually inspect the air sensor and its wiring for any signs of damage or moisture causing a short.
Restore power to the unit after a few minutes.
If the error persists, a qualified technician is required to diagnose and repair the sensor or wiring.