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R32 Air Con Compressor Wiring Help

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By replicate,
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The compreesor in my Cefiro recently gave out. I've been unable to find one the same so i'm using one from a R32. The only problem is the wiring. The Cefiro compressor has two plugs, both with just one wire. One of them is only connected on the compressor and seems to be an earth. The other acutally goes to the car. Nice and and simple. The R32 compressor has two plugs, one with one wire and the other with two. I have no idea what this second plug with two wires is for.

Any ideas?

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https://www.sau.com.au/forums/topic/104735-r32-air-con-compressor-wiring-help/
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  • 3 weeks later...
BH_SLO32 Proficient

BH_SLO32

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I've found out what the second plug is. Its the overheat protection for the compressor. On the Ceffie compressor it was wired before the connector. The R32 it is wired in off the compresor. I just need the R32 wiring diagram and its sorted.

I've had a look at the wiring diagram for the R32's and I would actually suggest the 2 wire plug is for the "Active Full Auto AC" and there is no reference to any form of overheat protection. The AC system in the R32s has an auto amplifier which from what I can determine performs some very basic logic functions thanks to monitoring of a number of sensors like intake air temp sensor, fresh air sensor, engine temperature sensor (not the same as the ECU temp sensor) etc. It appears to control the compressor via the additional 2 wires (1 wire is a feed from the amplifier and the other is an earth).

From what I have read the cefiros don't have a digital AC system in which case you shouldn't need to connect the other 2 wires. I disconnected the 2 wire plug on the compressor in my R32 and the compressor kicked in fine when I operated the AC in manual mode.

Hope this helps.

Cheers

Edited by BH_SLO32

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