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GeneralAire GA50A20 APS and PCB Replacement

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What seems to be the problem?

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WARNING: This unit can contain high voltages on the order of 6000VDC, pay attention to what you are doing.

Disconnect unit power wait 15 minutes for voltage to dissipate and open the top cover.

Disconnect the 24VAC power to the high voltage PCB to prevent generating high voltages.

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