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Yes the stuck EC light means the compressor is not running. Usually the case is low freon. But I know about the bulletin you mentioned about the refrig temp sensor. There was a bulletin out on these sensors, you can try to find out about it, but it involved basically "shuting off" the refrigerant temp sensor. It was a bit of over-engineering from the start, they decided the system was well-protected by the pressure sensor, so we were to program the control panel to ignore that sensor all together. NOT SURE on exactly which models this covered though, but was 210 related. I'd get codes read and go from there, or have the freon checked.
Gilly
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