Miller xmt 304 cc/cv help 2 and 4

[ethanreimer]

my xmt is throwing help 2 and 4 codes ; any thoughts would be apperciated. I live on the oregon coast. suggestions on where to get it serviced or discount parts would be helpfull thanks

[cruizer]

Because they both come on, going to say that the front pc3 card is pooched. Does the fan come on? Dust will stop that fan from turning, Its a 24VDC fan if you wanted to check it.

[M J Mauer]

Welcome to the forum.

[ethanreimer]

the fan

The fan spins by hand but does not come on, it also appears to be clean I will remove fan and check it if needed.
Thanks

[ethanreimer]

fan removed

I removed the fan from the circuit, it powers up with no issues. also removed board for visiual inspection, no damage. other than a very light dust here and there

[cruizer]

Well, the PC3 is pooched, very seldom are you ever going to see damage on a board without a Microscope

[ethanreimer]

pc-3

Thank you for your advice, do you. Have any recommendations on where to purchase a new or used pc-3 board.