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  1. Canadian Electrical Forum
    Hey all, I have an intermittent trouble on my conventional fire alarm panel that says 'OPEN NAC CCT 3 BPS6C BOOSTER' but it doesn't light up a zone. I've checked the panels connections and tightened everything up. I have put a resistor across NAC 2 (NAC 2 has an led trouble lit on the card) and...
    bps6c booster no zone open nac
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