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Old 03-31-2019, 02:35 PM   #1
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Onan MDKD control wiring

I tested my engine safety controls to ensure the unit is actually protected. Boiled water in a pot with the high coolant temp switch suspended inside. The switch closed at 250F. Reinstalled, when I ground the wire the fault breaker does pop out, but the engine keeps running? Same goes for the oil pressure safety switch. However, when I test the exhaust temp switch, the engine does stop? My unit is an 8kW, but the question should apply to other sizes in the range. I have the manuals for this unit.

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