Samsung split fault

[Keza]

Hi guys,

So I have a samsung split A/C with a communication fault.
The bottom 2 lights ( one with a clock and one with a plug) on the indoor machine flash together, indicating this fault.
Model: Outdoor- AQV24UWAX Indoor- AQV24UWAN

The indoor unit turns on and the fan runs, but faults out after about 30sec to a minute.

I have replaced the whole outdoor unit PCB assembly as there was a fried gecko on the PCB and it looked like it was on the communication part of the board. After replacing this the fault still existed. There was no voltage on F1 or F2 terminals at any stage.
There is fault lights on the outdoor PCB and they did not light up at any stage either.
I tested the interconnects to be fine.

Has anyone had similar issues as this? I'm thinking the indoor PCB may be faulty as well.
I am going to double check with my wholsaler that they did send the right PCB. A couple small components are in different spots in the board and it has a different "DB" number than the old one but it may just be superseded.

Cheers

[The Viking]

Sorry,
That model have not been sold in EU so I am not able to get the manual.

But one question, when you replaced the board did you move the EEPROM from the old board to the new?
Depending on the age of the unit, some of Samsung's splits have removable EEPROMs and on those the easiest way of getting the system up and running when replacing the PCB is to reuse the old EEPROM.


:cool:

[Keza]

Thanks for the reply Viking,

That's a good idea! I still have the old PCB so I will check and see if I can find a removable EEPROM.
I will have a look and get back to you.
One question tho, why wouldn't the new EEPROM work?

Thanks

[Keza]

I just checked the old PCB, there is a sticker on it indicating EEPROM but it's not removable. I remember when looking at the indoor PCB and wiring diagram it had an EEPROM as well.
I still don't know why any of the 3 LED's wouldn't be lit or indicating a fault on the new outdoor PCB. Unless the indoor PCB is causing them to not light up.

Cheers

[install monkey]

it will need the setup code- pain in the arse to find- similar manual to show how to input code page 60 ish
ftp://samsungehs.pl/Samsung%20Manuals/RAC/Service%20Manuals/AQV%2018%2024%20EWAN%20Service%20Manual.pdf

[Keza]

Thanks very much Install Monkey,

Will I have to program this via the remote? It's strange I've never had to do this before, usually just a straight swap.
Just don't know when to stop at the right info in the manual lol

Cheers

[Keza]

Hi guys,

I have an update.

I decided to go back to the site and test the outdoor fan motor. When I unplugged the fan motor and then turned the power on the LED's in the outdoor would light up. When it was plugged back in they would not. It must have a fault and is drawing all the power?
Wish they were like the old style air cons.

So I have ordered another fan motor and will try that.

[Keza]

Update:
Replaced outdoor fan motor and unit is working fine