Fujitsu · Air Conditioners
The red LED shows 3 pulses, the green LED blinks, and the yellow LED blinks. This indicates a closed circuit (short circuit) condition in the pipe temperature sensor, due to incorrect wiring or sensor damage.
Click steps to track your progress.
Turn off the air conditioner at the circuit breaker.
Inspect the pipe sensor and its wiring for any damage, kinks, or signs of moisture.
Restore power after a short period.
If the error persists, contact a qualified technician to troubleshoot and repair the short circuit.