Quote:
Originally Posted by MPaulHolmes
It's just a guess at this point, but possibly the only completely safe sequence for that version was:
ON:
1. Turn on 12v power.
2. Pre-charge resistor.
3. Close Contactor
OFF:
1. Open Contactor.
2. Turn off 12v power.
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Whoa, slow down a minute! Your starting /ON sequence is not cool! The reason why Kellys, Curtis and Alltrax kick the bucket is because the 12 volt power is activated BEFORE the Pre-Charge system has completed it's thing. I have to Precharge my Kelly BEFORE turning it on, as it's stated in the manual. Usually controller systems are always "charged" for the caps/PWM cycle to not kill itself.
When I PreCharge my Kelly, I can see it sucking up the AMPs through my current meter and I wait until it settles down. Usually I give it a minute or so, then I leave it alone.
Your listed Boot/ON Sequence is probably what destroyed the controller, it just didn't let out the smoke until it has done it a few times.