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Old 13th July 2020, 21:01   #31
SD1too
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Quote:
Originally Posted by inzer View Post
I think I have a broken condenser.
What do you think?
I think you're right!

Simon
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Old 14th July 2020, 01:00   #32
Steve42
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Default trinity switch testing

Hi all.
Is there a way of testing the trinary switch.
My air conditioning chap is saying my system is over pressure.

New compressor fitted.
Condenser is off a working system.
Regased.
Tests from the plug end of the trinity switch all good.
Air conditioning worked for 3 days then just stopped.

Using the trinity switch plug compressor kicks in and engine fan working fine.

Thanks all
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Old 14th July 2020, 01:01   #33
Steve42
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Default trinity switch testing

Hi all.
Is there a way of testing the trinary switch.
My air conditioning chap is saying my system is over pressure.

New compressor fitted.
Condenser is off a working system.
Regased.
Tests from the plug end of the trinity switch all good.
Air conditioning worked for 3 days then just stopped.

Using the trinity switch plug compressor kicks in and engine fan working fine.

Thanks all
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Old 14th July 2020, 06:34   #34
SD1too
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Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

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Location: Former Middlesex
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Quote:
Originally Posted by Steve42 View Post
My air conditioning chap is saying my system is over pressure.
Condenser is off a working system.
Hi Steve,

If your air con. specialist's gauge set is showing excessive pressure then that rules out a trinary switch failure.

Following the fitting of the second-hand condenser, was the system left on evacuation for 20 to 30 minutes before charging with refrigerant?

Simon
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Old 15th July 2020, 00:07   #35
Steve42
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Hi Simon,

Yes was left for around 30min.
Only thing left to change is the switch but wanted to see if there was a way of testing the switch.
On first start up after the regas the gauge was reading over pressure. And compressor was cutting in for two or 3 minutes then cut out.
After the front end was refitted and external temperature sensor was refitted it worked fine for 3 days. Then just stopped working.
Engine fan is working. Tested from the switch plug.
Compressor is working. Tested from the switch plug
Clutch is working. Tested from diagnostic kit.
Both fan speeds are working. Tested by diagnostic kit.
But no air con .

Thanks
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Old 15th July 2020, 08:13   #36
SD1too
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Thanks for your detailed reply Steve.

What did the gauge attached to the low pressure Schrader valve read? Was that high as well?

Is the compressor brand new? Is it the correct type for your engine?

Simon

Summary
High pressure immediately upon starting engine
New compressor
Compressor clutch tested (using diagnostic kit)
Second-hand condenser, 30 mins. vacuum
Radiator fan tested (higher speed from trinary connector, both speeds using diagnostic kit)
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