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S80 '98-'06 / S60 '00-'09 / V70 & XC70 '00-'07 General Forum for the P2-platform S60 / V70 / XC70 / S80 models |
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pre- works info gathering.Views : 1866 Replies : 31Users Viewing This Thread : |
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Jun 23rd, 2019, 19:19 | #21 |
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Hi to read the low pressure read with vida with out the compressor being on and before it has been on, you need to look at some charts on the webb that show the pressure vs temperature for the gas,
Dave |
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Jun 23rd, 2019, 19:38 | #22 |
Aka MadBabs
Last Online: Nov 11th, 2022 15:29
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Right...
Without measurement suggested by davebb, - and so- awaiting confirmation and with reference to this: http://rechargeac.com/how-to/ac-system-pressure-chart ambient temperature around 20-24deg Celcius i should have readings of compressor OFF - 241-310kPa (actual reading 880-900kPa) compressor ON- 1034-1172kPa (actual reading 1100-1250kPa) so... "low" reading waaay too high "high" reading nominal/on verge of "a bit too high" first thing coming to my head would be "system overfilled/overcharged" But.. I had it refilled some 2 or 3 years ago, for most of this time (that is- apart from last few months) it was working just fine. I can see how there could be LESS refrigerant after some time after recharge, but MORE? How? I for sure didn`t add any.
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`03 V70 Mk2 Auto 2.4 B5244 NA, 170Bhp, 295K miles (Now parts donor) '05 XC70 MK2 Geartronic, 2.5 B5254T2, 210bhp, 129k miles |
Jun 26th, 2019, 10:41 | #23 |
Aka MadBabs
Last Online: Nov 11th, 2022 15:29
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As per previous post- i have to assume that the normal pressure with system OFF- or in other words- low side should be within 1.7-3.2Bar (170-320kPa). information taken from general info in Vida.
In the same time website http://rechargeac.com/how-to/ac-system-pressure-chart tells me that in ambient temperature of 20-24degrees Ceslsius pressures should be: Low side 241-310kPa high side 1000-1172kPa my readings taken few minutes ago: after car being parked for nearly 3 hours, only ignition ON, not engine: 668.63kPa (i assume this to be LOW side reading)- fair bit too high after starting the engine with A/C OFF (mind the system will start the compressor together with engine, for a system check, even if A/C is OFF good to know for those with failed bearings) 778.04kPa - High.. Too high with engine running and A/C ON 1100kPa (+/-10, it fluctuates slightly, as expected)- I`sd say within norm booking visit for A/C suckout and recharge for this afternoon unless someone tells me otherwise before 4pm
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`03 V70 Mk2 Auto 2.4 B5244 NA, 170Bhp, 295K miles (Now parts donor) '05 XC70 MK2 Geartronic, 2.5 B5254T2, 210bhp, 129k miles Last edited by ThomasG; Jun 26th, 2019 at 10:43. |
Jun 26th, 2019, 19:29 | #24 |
Aka MadBabs
Last Online: Nov 11th, 2022 15:29
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170g of refrigerant recovered.
1000g recharged. Its cold again. Hopefully, its the end of this thread.
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`03 V70 Mk2 Auto 2.4 B5244 NA, 170Bhp, 295K miles (Now parts donor) '05 XC70 MK2 Geartronic, 2.5 B5254T2, 210bhp, 129k miles |
Jun 26th, 2019, 21:18 | #25 |
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Did you miss a zero on the amount recovered? I thought you had too much?
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Jun 26th, 2019, 22:33 | #26 |
Aka MadBabs
Last Online: Nov 11th, 2022 15:29
Join Date: Sep 2017
Location: London
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No o didn't miss a zero.
That was amount recovered, I wasn't told that by technician- I had my own eyes on the gauges and display of the machine. Tech explained it to me as "part of refrigerant that wouldn't go into liquid state anymore". Sounds a bit strange to me, I may do some digging into it at some stage, out of curiosity. But the main bit is- it works again. Will see for how long this time.
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`03 V70 Mk2 Auto 2.4 B5244 NA, 170Bhp, 295K miles (Now parts donor) '05 XC70 MK2 Geartronic, 2.5 B5254T2, 210bhp, 129k miles |
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Jun 26th, 2019, 23:37 | #27 |
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Last Online: Dec 26th, 2021 13:42
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It's interesting how low gas can create a high pressure reading which I suppose is similar to an airlock in a cooling system.
My AC pressure reading is doing similar and struggles to keep up when it's very warm due to low gas I'm guessing. It's been 4 years since my last regas though so it's overdue.
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Jun 27th, 2019, 12:21 | #28 |
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@ ThomasG
For comparison purposes, what are "your" readings now you have had the work done?
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V70 P2 2006 2.4 Petrol 170bhp Est SE Automatic (5 speed) MG Midget Mk1 1962 Previous: RR TDV8 3.6 '08; RR TD6 3.0 '02; RR P38A V8 '99; Audi A4 Cab 3.0 V6 2004; Volvo 740 GLE Est 1989 Have VIDA & VXDIAG NANO on W10Pro - happy to help |
Jun 27th, 2019, 13:20 | #29 |
Aka MadBabs
Last Online: Nov 11th, 2022 15:29
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That's a good one, JoeNinety.
I shall check that around midday tomorrow.
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`03 V70 Mk2 Auto 2.4 B5244 NA, 170Bhp, 295K miles (Now parts donor) '05 XC70 MK2 Geartronic, 2.5 B5254T2, 210bhp, 129k miles |
Jun 28th, 2019, 14:55 | #30 |
Aka MadBabs
Last Online: Nov 11th, 2022 15:29
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So.. for the record...
and I`ll just say that I`m a bit surprised myself: with engine OFF, ignition ON (after 4 hours parked) 595.69kPa engine ON, AC OFF, tickover- 790.2kPa engine ON, AC ON, tickover- around 1170kPa engine ON, AC ON, around 2100rpm- 1531kPa and yet it works...
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`03 V70 Mk2 Auto 2.4 B5244 NA, 170Bhp, 295K miles (Now parts donor) '05 XC70 MK2 Geartronic, 2.5 B5254T2, 210bhp, 129k miles |
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