Haier · Ductless Split Air Conditioners
The outdoor unit's LED1 flashes twelve times, indicating a failure with the outdoor ambient temperature sensor.
Click steps to track your progress.
Turn off the AC unit at the main power supply and wait 15 minutes, then restart it.
Ensure the sensor area on the outdoor unit is clean and unobstructed.
If the error persists, contact a qualified technician to inspect or replace the sensor.