One more thing, maybe it's an indication... When I got the car all R12 has been removed during import. As expected the compressor didn't run as low freon was detected. However, even at that time no "low freon detected" code was present und the A/C controller diagnostic mode. No idea why the compressor was shut off though no error war present.
It started running as soon as fresh r134 was charged.
I'll try to apply the error procedures outlined in the manual later today, yesterday I was trapped at home by a massive thunderstorm...
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