cooling

1
Have just got my aircond working in time for a hot couple of days in WA and its doing a reasonable job. I pulled up yesterday at home after a long run with the air cond on and the radiator fan was on high speed as I expected it would be. Because of the high ambient it ran and ran after I turned off the motor. (40mins +). After everything cooled down I went out to shift the car and discovered the fan had drained the battery completely and it wouldnt start until I had charged the battery. Is there something I could have done differently in this situation or is the thermostat on the fan need adjusting. Interested in your opinions. I parked on the hot bituman driveway would this have a bearing also? Greg
2
The thermostat on the fan may need replacing. 40 minutes is a long time.



> greg_navarro95 <greg_navarro95@yahoo.com> wrote:
>
> Have just got my aircond working in time for a hot couple of days in WA
> and its doing a reasonable job. I pulled up yesterday at home after a
> long run with the air cond on and the radiator fan was on high speed as
> I expected it would be. Because of the high ambient it ran and ran
> after I turned off the motor. (40mins +). After everything cooled down I
> went out to shift the car and discovered the fan had drained the battery
> completely and it wouldnt start until I had charged the battery. Is
> there something I could have done differently in this situation or is
> the thermostat on the fan need adjusting. Interested in your opinions.
> I parked on the hot bituman driveway would this have a bearing also?
> Greg
3
could it also be the relay that switches it on getting stuck on?
[2 0 / 2 1 Design]
28 Gwynne St
Richmond
Vic 3121
gary@twentytwentyone.net
www.twentytwentyone.net
Tel 3 9429 1868
Fax 3 9421 1110
Mob 0417 352782

On 19/01/2010, at 6:47 AM, plander@optusnet.com.au wrote:

 

The thermostat on the fan may need replacing. 40 minutes is a long time.

> greg_navarro95 <greg_navarro95@ yahoo.com> wrote:
>
> Have just got my aircond working in time for a hot couple of days in WA
> and its doing a reasonable job. I pulled up yesterday at home after a
> long run with the air cond on and the radiator fan was on high speed as
> I expected it would be. Because of the high ambient it ran and ran
> after I turned off the motor. (40mins +). After everything cooled down I
> went out to shift the car and discovered the fan had drained the battery
> completely and it wouldnt start until I had charged the battery. Is
> there something I could have done differently in this situation or is
> the thermostat on the fan need adjusting. Interested in your opinions.
> I parked on the hot bituman driveway would this have a bearing also?
> Greg


4
I remembered I went out during the 40mins to see if it would start and it wouldnt turn over. It was like it was "locked out" the ignition light came on but it wouldnt turn over. Is the lock out part of the safety so you dont cook the motor? Greg



--- In Syncro_T3_Australia@yahoogroups.com, Gary Cookson <gary@...> wrote:
>
> could it also be the relay that switches it on getting stuck on?
> [2 0 / 2 1 Design]
> 28 Gwynne St
> Richmond
> Vic 3121
> gary@...
> www.twentytwentyone.net
> Tel 3 9429 1868
> Fax 3 9421 1110
> Mob 0417 352782
>
> On 19/01/2010, at 6:47 AM, plander@... wrote:
>
> > The thermostat on the fan may need replacing. 40 minutes is a long time.
> >
> > > greg_navarro95 <greg_navarro95@...> wrote:
> > >
> > > Have just got my aircond working in time for a hot couple of days in WA
> > > and its doing a reasonable job. I pulled up yesterday at home after a
> > > long run with the air cond on and the radiator fan was on high speed as
> > > I expected it would be. Because of the high ambient it ran and ran
> > > after I turned off the motor. (40mins +). After everything cooled down I
> > > went out to shift the car and discovered the fan had drained the battery
> > > completely and it wouldnt start until I had charged the battery. Is
> > > there something I could have done differently in this situation or is
> > > the thermostat on the fan need adjusting. Interested in your opinions.
> > > I parked on the hot bituman driveway would this have a bearing also?
> > > Greg
> >
>
5

Greg,

Several possibilities.  The thermo switch on the radiator is staying on, the pressure switch on the AC compressor is staying on, or the fan relay is staying on.  On the very hottest of days, the fan needs only a few minutes to pull the temp back to the point where it shuts off.

Les

 

From: Syncro_T3_Australia@yahoogroups.com [mailto:Syncro_T3_Australia@yahoogroups.com] On Behalf Of greg_navarro95
Sent: 19 January 2010 00:47
To: Syncro_T3_Australia@yahoogroups.com
Subject: [Syncro_T3_Australia] cooling

 

 

Have just got my aircond working in time for a hot couple of days in WA and its doing a reasonable job. I pulled up yesterday at home after a long run with the air cond on and the radiator fan was on high speed as I expected it would be. Because of the high ambient it ran and ran after I turned off the motor. (40mins +). After everything cooled down I went out to shift the car and discovered the fan had drained the battery completely and it wouldnt start until I had charged the battery. Is there something I could have done differently in this situation or is the thermostat on the fan need adjusting. Interested in your opinions. I parked on the hot bituman driveway would this have a bearing also? Greg

6
No T25s are a bit too basic for that


> greg_navarro95 <greg_navarro95@yahoo.com> wrote:
>
> I remembered I went out during the 40mins to see if it would start and
> it wouldnt turn over. It was like it was "locked out" the ignition
> light came on but it wouldnt turn over. Is the lock out part of the
> safety so you dont cook the motor? Greg
>
>
>
> --- In Syncro_T3_Australia@yahoogroups.com, Gary Cookson <gary@...>
> wrote:
> >
> > could it also be the relay that switches it on getting stuck on?
> > [2 0 / 2 1 Design]
> > 28 Gwynne St
> > Richmond
> > Vic 3121
> > gary@...
> > www.twentytwentyone.net
> > Tel 3 9429 1868
> > Fax 3 9421 1110
> > Mob 0417 352782
> >
> > On 19/01/2010, at 6:47 AM, plander@... wrote:
> >
> > > The thermostat on the fan may need replacing. 40 minutes is a long
> time.
> > >
> > > > greg_navarro95 <greg_navarro95@...> wrote:
> > > >
> > > > Have just got my aircond working in time for a hot couple of days
> in WA
> > > > and its doing a reasonable job. I pulled up yesterday at home
> after a
> > > > long run with the air cond on and the radiator fan was on high
> speed as
> > > > I expected it would be. Because of the high ambient it ran and ran
>
> > > > after I turned off the motor. (40mins +). After everything cooled
> down I
> > > > went out to shift the car and discovered the fan had drained the
> battery
> > > > completely and it wouldnt start until I had charged the battery.
> Is
> > > > there something I could have done differently in this situation or
> is
> > > > the thermostat on the fan need adjusting. Interested in your
> opinions.
> > > > I parked on the hot bituman driveway would this have a bearing
> also?
> > > > Greg
> > >
> >
7
I think the radiator fan works straight from the a/c switch whether the compressor is on or not. That's how I have found them previously.

> pressure switch on the AC compressor is staying on,
8

Greg,

It sounds like the pressure switch is causing this. The pressure switch has 2 modes;

Low Pressure: This switches the A/C compressor OFF if the refrigerant pressure is too low (at 30psi) –occurs if there is a gas leak.

High Pressure: This switches the radiator fan  to  the higher speed if the refrigerant pressure is high (220 – 250psi)

Both of these switching signals go to their respective relays. On very hot days, as we are having in the West at the moment, the HP switch will cycle the high speed radiator fan for long periods. On switching the A/C off there should only be a few seconds of residual signal to keep the fan on.  If this stays on, as in your case, there could be two reasons for this. First, the pressure switch is faulty (HP side) – diagnose by unplugging the pressure switch connector behind the LHS headlamp, the fan should stop. Further check for continuity on the switch pins, HP should be open, LP should be closed. If this is ok, then the second reason would be the radiator fan relay is faulty  - probably unlikely as it the same relay that the radiator thermo switch controls and I gather this was operating ok before you had your A/C gassed.

A proper functional test of the pressure switch is done by pressurizing the system (after it is degassed) with nitrogen and observing the switch operating pressures. Your A/C shop should do this.

Best wishes – let us know what transpires.

Yurik

 

 

From: Syncro_T3_Australia@yahoogroups.com [mailto:Syncro_T3_Australia@yahoogroups.com] On Behalf Of greg_navarro95
Sent: Monday, 18 January 2010 9:47 PM
To: Syncro_T3_Australia@yahoogroups.com
Subject: [Syncro_T3_Australia] cooling

 

 

Have just got my aircond working in time for a hot couple of days in WA and its doing a reasonable job. I pulled up yesterday at home after a long run with the air cond on and the radiator fan was on high speed as I expected it would be. Because of the high ambient it ran and ran after I turned off the motor. (40mins +). After everything cooled down I went out to shift the car and discovered the fan had drained the battery completely and it wouldnt start until I had charged the battery. Is there something I could have done differently in this situation or is the thermostat on the fan need adjusting. Interested in your opinions. I parked on the hot bituman driveway would this have a bearing also? Greg

9
Thanks for your information gentleman I shall follow up on the leads you have given me and let you know the outcome. Greg




--- In Syncro_T3_Australia@yahoogroups.com, "Yurik Orlowsky" <yuriko@...> wrote:
>
> Greg,
>
> It sounds like the pressure switch is causing this. The pressure switch has
> 2 modes;
>
> Low Pressure: This switches the A/C compressor OFF if the refrigerant
> pressure is too low (at 30psi) -occurs if there is a gas leak.
>
> High Pressure: This switches the radiator fan to the higher speed if the
> refrigerant pressure is high (220 - 250psi)
>
> Both of these switching signals go to their respective relays. On very hot
> days, as we are having in the West at the moment, the HP switch will cycle
> the high speed radiator fan for long periods. On switching the A/C off there
> should only be a few seconds of residual signal to keep the fan on. If this
> stays on, as in your case, there could be two reasons for this. First, the
> pressure switch is faulty (HP side) - diagnose by unplugging the pressure
> switch connector behind the LHS headlamp, the fan should stop. Further check
> for continuity on the switch pins, HP should be open, LP should be closed.
> If this is ok, then the second reason would be the radiator fan relay is
> faulty - probably unlikely as it the same relay that the radiator thermo
> switch controls and I gather this was operating ok before you had your A/C
> gassed.
>
> A proper functional test of the pressure switch is done by pressurizing the
> system (after it is degassed) with nitrogen and observing the switch
> operating pressures. Your A/C shop should do this.
>
> Best wishes - let us know what transpires.
>
> Yurik
>
>
>
>
>
> From: Syncro_T3_Australia@yahoogroups.com
> [mailto:Syncro_T3_Australia@yahoogroups.com] On Behalf Of greg_navarro95
> Sent: Monday, 18 January 2010 9:47 PM
> To: Syncro_T3_Australia@yahoogroups.com
> Subject: [Syncro_T3_Australia] cooling
>
>
>
>
>
> Have just got my aircond working in time for a hot couple of days in WA and
> its doing a reasonable job. I pulled up yesterday at home after a long run
> with the air cond on and the radiator fan was on high speed as I expected it
> would be. Because of the high ambient it ran and ran after I turned off the
> motor. (40mins +). After everything cooled down I went out to shift the car
> and discovered the fan had drained the battery completely and it wouldnt
> start until I had charged the battery. Is there something I could have done
> differently in this situation or is the thermostat on the fan need
> adjusting. Interested in your opinions. I parked on the hot bituman driveway
> would this have a bearing also? Greg
>
10
Yurik,
Do you have a wiring diagram for the Aussie fitted a/c? It sounds a bit more complex than the ones that I have worked on. The ones that I have seen just have a wire scotchlocked the the radiator fan thermoswitch. Ignition on + A/C on + fan on = radiator fan running continuously.

Phill



> Yurik Orlowsky <yuriko@iinet.net.au> wrote:
>
> Greg,
>
> It sounds like the pressure switch is causing this. The pressure switch
> has
> 2 modes;
>
> Low Pressure: This switches the A/C compressor OFF if the refrigerant
> pressure is too low (at 30psi) -occurs if there is a gas leak.
>
> High Pressure: This switches the radiator fan to the higher speed if
> the
> refrigerant pressure is high (220 - 250psi)
>
> Both of these switching signals go to their respective relays. On very
> hot
> days, as we are having in the West at the moment, the HP switch will
> cycle
> the high speed radiator fan for long periods. On switching the A/C off
> there
> should only be a few seconds of residual signal to keep the fan on. If
> this
> stays on, as in your case, there could be two reasons for this. First,
> the
> pressure switch is faulty (HP side) - diagnose by unplugging the
> pressure
> switch connector behind the LHS headlamp, the fan should stop. Further
> check
> for continuity on the switch pins, HP should be open, LP should be
> closed.
> If this is ok, then the second reason would be the radiator fan relay is
> faulty - probably unlikely as it the same relay that the radiator
> thermo
> switch controls and I gather this was operating ok before you had your
> A/C
> gassed.
>
> A proper functional test of the pressure switch is done by pressurizing
> the
> system (after it is degassed) with nitrogen and observing the switch
> operating pressures. Your A/C shop should do this.
>
> Best wishes - let us know what transpires.
>
> Yurik
>
>
>
>
>
> From: Syncro_T3_Australia@yahoogroups.com
> [mailto:Syncro_T3_Australia@yahoogroups.com] On Behalf Of greg_navarro95
> Sent: Monday, 18 January 2010 9:47 PM
> To: Syncro_T3_Australia@yahoogroups.com
> Subject: [Syncro_T3_Australia] cooling
>
>
>
>
>
> Have just got my aircond working in time for a hot couple of days in WA
> and
> its doing a reasonable job. I pulled up yesterday at home after a long
> run
> with the air cond on and the radiator fan was on high speed as I
> expected it
> would be. Because of the high ambient it ran and ran after I turned off
> the
> motor. (40mins +). After everything cooled down I went out to shift the
> car
> and discovered the fan had drained the battery completely and it wouldnt
> start until I had charged the battery. Is there something I could have
> done
> differently in this situation or is the thermostat on the fan need
> adjusting. Interested in your opinions. I parked on the hot bituman
> driveway
> would this have a bearing also? Greg
11

Phill,

I am waiting for Stuart Parry to return from holidays so that I can go and look at his Prestige wiring, which we think is original.  That might give us some leads.

Les

 

From: Syncro_T3_Australia@yahoogroups.com [mailto: Syncro_T3_Australia@yahoogroups.com ] On Behalf Of plander@optusnet.com.au
Sent: 20 January 2010 07:10
To: Syncro_T3_Australia@yahoogroups.com
Subject: Re: RE: [Syncro_T3_Australia] cooling

 

 

Yurik,
Do you have a wiring diagram for the Aussie fitted a/c? It sounds a bit more complex than the ones that I have worked on. The ones that I have seen just have a wire scotchlocked the the radiator fan thermoswitch. Ignition on + A/C on + fan on = radiator fan running continuously.

Phill


12

Phill,

I don’t have a wiring diagram but am in the process of tracing the circuit of the Prestige aftermarket A/C in the Trakka. Some areas are hard to access however when completed I will make the circuit diagram available to the group.

Yurik

 

From: Syncro_T3_Australia@yahoogroups.com [mailto:Syncro_T3_Australia@yahoogroups.com] On Behalf Of plander@optusnet.com.au
Sent: Wednesday, 20 January 2010 4:10 AM
To: Syncro_T3_Australia@yahoogroups.com
Subject: Re: RE: [Syncro_T3_Australia] cooling

 

 

Yurik,
Do you have a wiring diagram for the Aussie fitted a/c? It sounds a bit more complex than the ones that I have worked on. The ones that I have seen just have a wire scotchlocked the the radiator fan thermoswitch. Ignition on + A/C on + fan on = radiator fan running continuously.

Phill

> Yurik Orlowsky <yuriko@iinet.net.au>
wrote:
>
> Greg,
>
> It sounds like the pressure switch is causing this. The pressure switch
> has
> 2 modes;
>
> Low Pressure: This switches the A/C compressor OFF if the refrigerant
> pressure is too low (at 30psi) -occurs if there is a gas leak.
>
> High Pressure: This switches the radiator fan to the higher speed if
> the
> refrigerant pressure is high (220 - 250psi)
>
> Both of these switching signals go to their respective relays. On very
> hot
> days, as we are having in the West at the moment, the HP switch will
> cycle
> the high speed radiator fan for long periods. On switching the A/C off
> there
> should only be a few seconds of residual signal to keep the fan on. If
> this
> stays on, as in your case, there could be two reasons for this. First,
> the
> pressure switch is faulty (HP side) - diagnose by unplugging the
> pressure
> switch connector behind the LHS headlamp, the fan should stop. Further
> check
> for continuity on the switch pins, HP should be open, LP should be
> closed.
> If this is ok, then the second reason would be the radiator fan relay is
> faulty - probably unlikely as it the same relay that the radiator
> thermo
> switch controls and I gather this was operating ok before you had your
> A/C
> gassed.
>
> A proper functional test of the pressure switch is done by pressurizing
> the
> system (after it is degassed) with nitrogen and observing the switch
> operating pressures. Your A/C shop should do this.
>
> Best wishes - let us know what transpires.
>
> Yurik
>
>
>
>
>
> From: Syncro_T3_Australia@yahoogroups.com
> [mailto:Syncro_T3_Australia@yahoogroups.com]
On Behalf Of greg_navarro95
> Sent: Monday, 18 January 2010 9:47 PM
> To: Syncro_T3_Australia@yahoogroups.com
> Subject: [Syncro_T3_Australia] cooling
>
>
>
>
>
> Have just got my aircond working in time for a hot couple of days in WA
> and
> its doing a reasonable job. I pulled up yesterday at home after a long
> run
> with the air cond on and the radiator fan was on high speed as I
> expected it
> would be. Because of the high ambient it ran and ran after I turned off
> the
> motor. (40mins +). After everything cooled down I went out to shift the
> car
> and discovered the fan had drained the battery completely and it wouldnt
> start until I had charged the battery. Is there something I could have
> done
> differently in this situation or is the thermostat on the fan need
> adjusting. Interested in your opinions. I parked on the hot bituman
> driveway
> would this have a bearing also? Greg

13

Yurik,

You will do a better job of tracing than I can so I won’t look at Stuart’s wiring until you have come up with a diagram.

Les

 

From: Syncro_T3_Australia@yahoogroups.com [mailto: Syncro_T3_Australia@yahoogroups.com ] On Behalf Of Yurik Orlowsky
Sent: 20 January 2010 12:44
To: Syncro_T3_Australia@yahoogroups.com
Subject: RE: RE: [Syncro_T3_Australia] cooling

 

 

Phill,

I don’t have a wiring diagram but am in the process of tracing the circuit of the Prestige aftermarket A/C in the Trakka. Some areas are hard to access however when completed I will make the circuit diagram available to the group.

Yurik

 

14
Even a hand drawing would be OK, and I will convert it to a VAG format for the web.



> Les Harris <leslieharris@optusnet.com.au> wrote:
>
> Yurik,
>
> You will do a better job of tracing than I can so I won't look at
> Stuart's
> wiring until you have come up with a diagram.
>
> Les
>
>
>
> _____
>
> From: Syncro_T3_Australia@yahoogroups.com
> [mailto:Syncro_T3_Australia@yahoogroups.com] On Behalf Of Yurik Orlowsky
> Sent: 20 January 2010 12:44
> To: Syncro_T3_Australia@yahoogroups.com
> Subject: RE: RE: [Syncro_T3_Australia] cooling
>
>
>
>
>
> Phill,
>
> I don't have a wiring diagram but am in the process of tracing the
> circuit
> of the Prestige aftermarket A/C in the Trakka. Some areas are hard to
> access
> however when completed I will make the circuit diagram available to the
> group.
>
> Yurik
>
>