Quote:
Originally Posted by avendlerdp
Here's the next rub: If I put back in the Klima and turn on the AC I get no voltage to the compressor. It looks like I have two things wrong here. My low pressure switch works fine and there is enough in the system so it's on.
There is another un-used pressure switch on the dryer. Normal?
Last question, how does the compressor start up if the speed sensor tells it not to if it does not match engine speed? Is there a "start up" circuit in the KLIMA?
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If the CCU is properly grounding socket #10, the issue is either the Klima itself, or one of the speed sensors that the Klima uses to verify that the compressor is rotating. There are specific checks that you can perform to verify that the speed signal from the tach and from the compressor are correct. If they are correct, and the Klima won't engage the compressor, the Klima itself is the culprit But, a lot of folks have replaced the Klima, only to find that the problem remains. So, the tests must be done carefully. I'm not at home, so I can't provide them here, but, they are on Braingears.
I'm not aware of any unused pressure switches on the dryer.
That's actually an excellent question, and, one for which I have no immediate answer. The Klima can't get a speed reference,
AFAIK, without the clutch engaged. But, the clutch can't engage unless the Klima gets the speed reference. Clearly a conundrum. I'm sure there must be a timing sequence in the Klima to allow the clutch to engage for a specific time before the Klima drops the compressor. The testing for the speed reference involves manually closing the clutch via pins 5 and 7, so, you'll need a functioning clutch before we proceed any further with testing of the Klima and it's associated sensors.