I have an MC42 with ID tag #3 displaying fault 3 red 2 yellow. ID tag was replaced due to 1.74k ohm resistance check, specification is 1.5 k ohms but Its still flashing the same error. Is there a way to test the MC42 address tag circuit for diagnostics of a faulty MC42?
Questions
No, not really.
You could check what voltage you have on the ADDR-H pin, should be 5V.
But that is something that we should have checks on in our modules.
What address do you have in the application you have loaded in the MC4?