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What could cause the power contactor in a dual voltage Compact 750 or Alpha 1000 to pull in on the 110 volt setting, but not pull in on the 220 volt setting?

April 26, 2017Alpha cause compact contactor dual power pull voltage

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What could cause the power contactor in a dual voltage Compact 750 or Alpha 1000 to pull in on the 110 volt setting, but not pull in on the 220 volt setting?

1 Answer

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The control circuit transformer is bad (open) and would cause this symptom to happen.