po izgledu unutarnje to bi trebao bit neki od ovih
016223-1000EA

015553-1000B7

015553-10023F

017553-10021d

Preparing the remocon to main PBA option set

Remove the battery from the remocon.
Press the temperature raise/down button simultaneously and insert the battery again.
Make sure the remocon display showes zeroes
Step 2 : Second stage preparation of the remocon option set.
❈ Note ; In case the wrong letter has been selected, continue to press the button until the correct letter appears.
1

Whenever pressing the buttons mode, temp down ,temp up, vent,on timer ,of timer number changes
0~9(0123456789) and A, b, c, d, E, F each time.
! If the first number is correct otherwise press until
appear.
Reconfirming option set after completion


Pressing the ON/OFF button
When pressing the operation ON/OFF key with the direction of remote controller for unit, the sound “Ding” or “Diriring” is
heard and the OPERATION LED lamp is flickering at the same time, then the input of option is completed.
(If the diriring sound isn’t heard, try again pressing the ON/OFF button.)

This reply was put on another post cagman, from paul h and superswill...

It's no so hard that you need a whole HOW-TO guide. Remove one battery, hold down the temp setting up AND down buttons while refitting the battery.
You should get a screen like superswill says, ie:
10
00
00
Enter the first six digits that superswill gave, then press mode. You enter the codes by pressing certain buttons for each digit/line. 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 that superswill gave.
press mode and the on/off
if no response you have a dead unit/receiver PCB/remote transmitter