Daikin AT12BV1LS Pocket Manual page 6

Si10-417
Multi
Service Diagnosis
There are green and red LEDs on the PCB. The flashing
green LED indicates normal equipment condition, and
the OFF condition of the red LED indicates normal
equipment condition.
(Troubleshooting with the green LED)
The LED A (green) of the outdoor unit indicate
microcomputer operation condition.
Even after the error is cancelled and the equipment
operates in normal condition, the LED indication
remains.
Diagnosis by LED
5