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Paul,
I did the test and when measuring the output on GR1-GR10 on the control board side the voltage drops indeed when the yellow leds start flashing so i assume the whole unit is working fine.
I did notice one thing, when hooking up the volt meter on the powerboard side of every GR1-GR10 the voltage stays up. I guess it has something to do with the voltmeter causing a 'disturbed' signal to the powerboard ?
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