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Old 01-12-2013, 12:19 AM   #5954 (permalink)
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It definitely sounds like a control board rather than a power section problem. Do you know if there's an error according to RTD Explorer? The FB (fault bits) would be something other than zero. Maybe the hcpl-4504 or mosfet driver is having issues. It sounds like if the current goes too high, then the weird thing happens. Can you save the RTD graph to show what happens?
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