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Barrie1992
06-09-2016, 07:10 PM
Hi this is my first post and have been working on a system I am not familiar with at all. The system is running ok in heating but when switching over to cooling it then suddenly goes into vac and cuts out within seconds. 4 way valve has been changed and the only thing that I can see which looks like it could be a TXV is this picture attached any help or advice much appreciated

chemi-cool
06-09-2016, 07:58 PM
This is not a TXV. Its a pressure control.

Barrie1992
06-09-2016, 08:24 PM
Thank you, I thought as much just wanted to make sure as could not find a TXV anywhere on the system so had to second guess. Any ideas why it is going into vac once in cooling? Cheers

al
06-09-2016, 08:29 PM
Cooling expansion valve is most likely blocked, track your liquid line to the evaporator, maybe it is a piston type which will look like a flare nut?

Brian_UK
06-09-2016, 08:36 PM
Is the new 4 way valve operating correctly?

Barrie1992
06-09-2016, 08:40 PM
Yeah the new 4 way valve is working efficiently this was my first port of call and installed the new one today still no luck

Brian_UK
06-09-2016, 11:17 PM
Get a service manual from the manufacturers so that you can identify the circuit parts.

al
06-09-2016, 11:17 PM
was the system doing the same thing before replacing the 4 way valve?

Barrie1992
07-09-2016, 09:04 AM
was the system doing the same thing before replacing the 4 way valve?

Hi, yeah doesn't seem to have changed at all with the new one :/

Barrie1992
07-09-2016, 09:14 AM
Get a service manual from the manufacturers so that you can identify the circuit parts.
I've looked for info everywhere on the web but with them being Spanish it's impossible to read and can't find anything associated with the model and with it being at least ten years old don't think I'll have much look

eggs
07-09-2016, 08:38 PM
Try CDL in Warrington or Hushon. We have bought Hitecsa from both in the past. They may be able to help. I have a couple of manuals in pdf. Ping me your email and i'll send them to you.
Can't see much having changed over 10 years as they are quite prehistoric.

Cheers

Eggs