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Hi Ed. I'm no expert on DCC, I'm still learning. I have a few questions to ask so can get a clear understanding of the situation. [quote]QUOTE: by gmpullman ... That gives me 8 power districts. (1-4 ; 5-8) If I run an engine from district 2-3 there's no short but if I run from, say, 1 to 6 or 8 into 3 then there's a short going into the next district.[/quote] 1) The short happens between boosters, not districts within the same booster. Right? [quote]QUOTE: If I shut the boosters down and restart them everything is OK for a while then the problem occurs and does not go away![/quote] 2) The problem is not consistent? Sometimes you can cross districts (between boosters) without shorting. But after a while it will? [quote]QUOTE: If I put a test light across the rail gap it lights (A to A)....[/quote] 3) Between boosters? That means they're out of phase with each other. Right? [quote]QUOTE: When a short does occur the booster shuts down, NOT the PS-4.[/quote] It makes me think the thermo protection is shutting down the booster before the circuit breaker is tripped. Or that the circuit breaker in the boosters are more sensitive or a lower amp rating than the PS-4. [quote]QUOTE: I've been running the layout in the past with no problems and I don't know what would have changed to cause this problem? Any ideas? Thanks, ED [/quote] 4) It's been up and running and you have crossed booster districts before without problems and you have not changed any trackage or any wiring. Right? Electronic get buggy as soon as the warranty expires. That's been my experience with a Kodak Easy Share Printer last week end. Well, sorry I don't know either. If we were having a betting pool, I'd pick the automatic reversing circuit in at least one booster has a defect causing an out of phase situation thereby causing a circuit breaker (or thermo protection) in one or both boosters to trip before the PS-4 circuit breaker. [%-)] Please keep us updated!
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