Wanted new A/C compressor for a ZT260

[Jules]

No resistor visible (through front grill means you have a 3 speed motor.
But on the V8's, 2 speeds were "combined" LOW & MED IIRC.

Just make sure the Fan is running as soon as Aircon is switched ON.
If you have no gas at the moment, fear not, you can simulate Gas present at the Trinary Switch.

LOW SPEED fan test
Unplug the Trinary plug on the HP (high pressure) AC pipe & with a paper clip with flattened ends, short the *2 opposite wires that are closer together* (Blue/Grey on pins 1 & 4) to see if you can hear the compressor solenoid kick in or indeed fan operation.

Pic below colours differ as this is a Diesel model but principle is similar.
Sorry I keep meaning to upload the V8 workshop library pics i have

Location of Trinary switch (ALL Engine Variants).
Driver's side bulkhead on small bore HP (high pressure) Aircon pipework.


Ignore wire colours here. Top & bottom wires on V8 will Blue /grey



Diesel Pic here again.
For V8 join the opposite pair (pins 1 & 4 blue grey).
After a short delay SLOW speed should kick in.
Also a clunk will be heard as compressor solenoid energises



HIGH SPEED Test
A quick way to test HIGH speed on a V8 is to unplug the temp sensor (front top of engine 2 red wires)

This latter test may trigger MIL Lamp, but fear not, it will clear itself after a few journeys!
Alternatively disconnect the Battery for 10 mins (wait for NAV computer LED to extinguish)


The V8 Cooling fan cut in temps for cooling fan I believe are identical to the KV6 spec

KV6

If the ECT sensor registers engine coolant temperatures of:

Between 96°C and 100°C, = Low fan speed
Between 102°C and 106°C, = Medium fan speed
Between 108°C and 112°C, = High fan speed

[sjr]

Thanks for that Jules, I will check that out.

SJR

[Ragman]

Originally Posted by sjr

No it's still not fixed, we were abroad and now we are still on holiday back home. I am trying to work out what exactly needs to be replaced compressor, condenser, drier, manifold as I am worried about "Black death" affecting the other components. The compressor has definately gone but how much else has it taken with it?

Asking for a Galaxy one would be easier with the suppliers.

SJR

OK showing my ignorance once again - what is "Black Death"

[sjr]

It is when the compressor runs without oil, it then generates swarf/filings, these bits of metal gets into the rest of the A/C system, the condenser is easily blocked. the result is that you need to replace a few components and it needs a flush through before installing any new parts.
That is my understanding anyway.

SJR

[Ragman]

Thanks - air con is one are I know nowt about (one of many areas!)