Aircon Charge pressure reading on High & Low sides Vito Viano?

[ahuncutka]

Hi,

Can someone help please! It looks like, something not quite right with my aircon on the Viano. It needed a small amount of recharge as it was not cooling... Apparently only needed a little refrigerant to make it cool.

The analogue pressure gauges now show 18c outside & Engine ide: moving between 25-35psi on low side and simultaneously on the high side 150-250psi Engine on idle, Both gauges crawl up simultaneously and come down between the above figures...
The aircon guy reckons it’s too high of a reading on the high side and might be the expansion valve playing up and needs changing.

I plugged my star software on and states, that the max acceptable pressure is 360psi compressor runs 86-96% again on idle but Star says it should ne 100%. evaporator temp 3.5-6c pressure fluctuates between 10 -17Bar (150-250psi)

Anyone who can tell me if the above readings are ok, or does it need attention? And if so where do we look???

Help greatly appreciated!!!

Thanks in advance!!!

 

[alabbasi]

Just based on what you're saying:

150psi on the high side sounds about right. 250psi sounds a little too high. It sounds like it's cycling, probably because you're over charged or due to a blocked expansion valve. When you rev the engine, where does the low side read?

 

[ahuncutka]

Hi alabasi,
when i first reved it up the low side dropped to 10psi but after 40-60sec and steady 2000rpm low side sits nicely at 20psi and does not move. the high side sits at 170-180psi nice and steady... ???
Is that any good???

 

[ahuncutka]

Mind you, not sure how much it matters but its 18c outside = 65F'