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Fran Valdivia
TryHard
Wollongong NSW
Soarer TT & V8 Limited

Posts: 427
Reg: 01-2007

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Thursday, November 20, 2008 - 05:57 pm, by:  Fran Valdivia (Silvasoarer) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Hope this is a fresh question, but if someone has seen this problem before have your say, hassle me but please point me in the right direction.

Took V8 Limited to get re-gassed.
EMV not working but under the impression that aircond will work without it.
Prior to re-gas, could hear the compressor coming on and off when switching aircond on and off, so assumed it was functional.
System is full of refrigerant gas.
Compressor engages and disengages.
Electrician had to bridge out aircond solenoid because switch signal from car "flickers" and doesn't stay on, thus compressor comes on and off sporatically, is this because the EMV is not working?

Also the compressor switches on but doesnot pump the refrigerant gas, is this also because of the fault in the EMV, or is it because the compressor could be cacktus?

Just wanted to know if anyone can help, before I try locate a second hand aircond compressor.

Thanks all in advance.
Fran
Matt Petersen
TryHard
NA
V8

Posts: 346
Reg: 01-2008

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Thursday, November 20, 2008 - 08:22 pm, by:  Matt Petersen (Mattmannz) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Not sure about the EMV but with the compressor, does it have refrigerant in it?

How do you think it's not moving the gas? Do the pressures not change when the compressor is running?

The output signal to trip the compressor will be dependent on a bunch of things including feedback from the compressor, pressure switches and ambient temp sensors so the fact that the signal is flickering doesn't mean anything.

Matt.
Luke Gomer
Goo Roo
Dorset
Uzz31 LTD

Posts: 267
Reg: 07-2005

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Thursday, November 20, 2008 - 09:53 pm, by:  Luke Gomer (Luke) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Fran, air con failure is often due to the pump being seized - nothing to do with the EMV or sensor faults
Fran Valdivia
TryHard
Wollongong NSW
Soarer TT & V8 Limited

Posts: 429
Reg: 01-2007

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Thursday, November 20, 2008 - 10:44 pm, by:  Fran Valdivia (Silvasoarer) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Hi Luke, pump has not seized, when switched on it engages the pulley.

Hi Matt, yes there is refrigerant,
the gas isn't moving
the electrician that had the car today said the system was full, but shows no pressure movement when compressor is on on his gauges.

Maybe a blockage but the compressor doesnt make any noises like its struggling, maybe seals or vanes are gone in it. No idea!

So if theres no pressure would that send a signal back to the EMV which in turn returns a signal to compressor to switch off, kind of a dog chasing its own tail!

Thanks guys for the info
Matt Petersen
TryHard
NA
V8

Posts: 347
Reg: 01-2008

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Friday, November 21, 2008 - 04:42 am, by:  Matt Petersen (Mattmannz) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Correct Fran, if the system pressure is low then the compressor will stop.

Matt.
Luke Gomer
Goo Roo
Dorset
Uzz31 LTD

Posts: 268
Reg: 07-2005

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Friday, November 21, 2008 - 06:33 am, by:  Luke Gomer (Luke) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Still nothing to do with the EMV.

The AC will operate without the EMV as the AC has its own ECU.
Fran Valdivia
TryHard
Wollongong NSW
Soarer TT & V8 Limited

Posts: 436
Reg: 01-2007

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Friday, November 21, 2008 - 05:45 pm, by:  Fran Valdivia (Silvasoarer) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Luke Gomer wrote on Friday, November 21, 2008 - 06:33 am:

AC has its own ECU




I wonder if this is the problem then

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