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If voltage is correct, go to step 4D. If no voltage, verify
that the GFCI or standard receptacle has power.
If voltage is good go to step 4F. If no/low
voltage go to step 4E.
Verify 115-125 VAC at
input terminal TB1.
Step 4C
Verify 20-24 VAC
between yellow wires
Step 4D
4. Display Only, Lights Only or Neither