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#27119 - 06/04/19 06:55 PM
TAC 20 ISSUE
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Joined: Mar 2017
Posts: 25
elevatorguycny
newbie
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newbie
Joined: Mar 2017
Posts: 25
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Ok, here's the scenario. Turn power on, starter lights up after everything boots and immediately goes dead. MCC1 relay not pulling in (should pull in after CPU boots up and energizes it if it doesn't see any faults). Without MCC1 contacts made we get no control power to the starter. Ok, this all makes sense, we have a fault somewhere. Here's where it gets tricky. Shut power off, remove DLT (top terminal limit) relay, turn power back on, after CPU boots up, starter turns on nd MCC1 pulls in and we have control power. We have checked selector, it has power, it has a green flashing watchdog, and there is no red fault LED lit. On normal with power on, both DLB and DLT relays are made and contacts are good when away from respective terminal limit magnets. What are we missing?
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