My pdh is blinking red on one of the fuse slots. We have not put any code. When connected to load or not connected to load, it still blinks.
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This should help, red blinking most likely means that the channel has no voltage and there is an active fault.
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It should just be a sticky fault on the PDH, sometimes they can show up if your breaker isn’t properly inserted or just at random. If it happens regardless of if it’s connected or not connected and there aren’t any apparent issues (no voltage, etc.) when connected to a device, then you can just clear the sticky fault on the REV Hardware Client, which is what our team usually does when we face this issue.
Some reference material to look at:
Hope this helps! 
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Thank you all!
You can update the firmware on the PDH itself, which may help to reduce any false alarms here. But, yeah clear the sticky faults.
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