can any body help with this

[MnM11]

Supaheat: 26degs,
Evap: -11degs.
Condens: 48degs.
Compressor: 126degs (thats our GT6 sensor when it alarmed).
GT10: 12degs (ground loop in).
GT11: 7.5degs (ground loop out).
Heavy frosting on expansion valve, which would defrost in my hand but after about a minute. Would expect a much quicker response.
No subcooling temps.

the gas is 407c

[install monkey]

faulty tev/orifice blocked

[MnM11]

Hi Thanks install monkey! Can you explain why its the TEV and not an undercharge?

[install monkey]

heavy frosting on thr tev and ur condenser is 48deg,what are ur running pressures

[MnM11]

hi hes not sent me running pressures but has adjusted valve and now getting these readings


Supaheat: 15degs.
Evap: -3degs.
Condens: 52degs.
Compressor: 110degs.
No frosting on expansion valve.

what pressures should we be looking at?
the system has been running fine for 12 months prier to this.

[MnM11]

what should super heat be?

[AlexG]

Superheat 6...10K
Subcooling 5...8 K

[cold.man]

have you checked your liquid line sight glass?
how does you liquid line drier feel?
15k still is a wide superheat.
restriction
or short of gas

[MnM11]

Hi Cold Man thanks
I suggested that it might be short of gas, but he did not check the sight glass yet
Can you explain how u would tell the difference between whether it was the tev or undercharge?
I know that the system has all been sized properly, and has been running fine for nearly a year
The frosting and the high compressor reading made me think its not getting enough gas but I don't know what the different symptoms would be for whether its a tev restriction or undercharge. I don't think the tev was set wrong but I know they can sometimes need adjustment - but would that be after a year?

Dont know if am making sense now as it the middle of the night

[MnM11]

It's allright thanks - I got it. I was just getting myself confused