WTIU blowing circuit

I'm not positive, but I believe the new WTIU needs to be powered via the PWR input with a 16-22V AC or DC power supply.

Check the fuses in the WTIU.  They use a 15 amp blade fuse.  if blown and it blows again when replaced, the TVS shorted.  We just had one came back to MTH with two blown fuses and two shorted TVS's.  The owner has a history of destroying stuff...

I did check the fuses, and all appear to be ok. When just having the power source that came with it plug in, by all the indicator lights, it boots up like it should, I just can’t run track power through it as instructed without popping the circuit breaker on the power brick.

I had a similar problem with one of the newer PH180s because I didn't have a pin in the third position of the connector.  Of course, if you had it working before with the old TIU, then that's obviously not the problem here.

@a1hobo posted:

I did check the fuses, and all appear to be ok. When just having the power source that came with it plug in, by all the indicator lights, it boots up like it should, I just can’t run track power through it as instructed without popping the circuit breaker on the power brick.

If it pops the breaker with nothing connected to the WTIU outputs, I'd send it back for repair.

I pulled the WTIU apart again just to double check myself on the fuses. They were fine, what I did find was one strand of very very fine wire laying across the two Fixed 1 out poles. I removed that and what do you know it’s not popping the power brick anymore and seems to function fine ( so much for quality control ) now the question is….. when power is applied you hear what sounds like a click, almost like a relay. Other than that it works fine. So what’s the loud click, is it supposed to do that, my older TIU’s were silent.