Samsung AQV12FAN reset codes

Q:
I have a samsung aqv12fan unit not working just the 3 lights 2x green 1x red constantly flashing.

A:
Try a reset of the unit.

Remove one battery, hold down the temp setting up AND down buttons while refitting the battery.
You should get a screen which says:

10
00
00

Enter the six digits:

09 48 77

You enter the codes by pressing certain buttons for each digit/line.
Then press 'mode' button.
It's not that hard to work out which button effects what digit.
Try it, and work it out, you can't go wrong if you just make sure the right digit sequence shows up when you press the mode button.
You will be greeted with another screen saying:

10
00
00

Enter the next six digits:

17 52 45

Press 'mode' and the 'on/off' buttons.

This should fix your issue.

if no response you have a dead unit/receiver PCB/remote transmitter.