when will green lights come on unit only red lights with humm and the inside panel does not display on the Surge Guard 40250-RVC Automatic Transfer Switch? (Surge Guard 40250-RVC Plus Automatic RV Transfer Switch 50 Amp)

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Surge Guard 40250-RVC Plus Automatic RV Transfer Switch 50 Amp

The RV Surge Guard Plus 50 Amp transfer switch provides premium protection for your motorhome.

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