Quote:
Originally Posted by Bman
Connected to 50A service. Batteriese factory installed. lithium batteries. The breaker tripping has gone on for at least 9 months now and has tripped 5 times in 9 months. The unit also has solar panels factory installed. TV stayed on but lost signal. AC shut down due to incommand lost power when breaker tripped.
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With InCommand and KeyTV, those devices require 12VDC to operate. BOTH will shut down if the battery AND/OR the converter are no longer providing 12VDC power to the trailer electrical systems.
It sounds like either there is a connection/corrosion issue with the 120VAC wiring on that converter circuit breaker/wiring connections to the converter unit or a bad breaker. You say they replaced the converter, but did not mention whether they inspected the actual power distribution 120VAC wiring, connections and circuit breakers. It's possible that your trailer may have been shipped from the factory with a defective circuit breaker and it's still being used for the converter. It's possible that there might be a loose connection on either the neutral wire for that circuit or on the "hot wire" where it's screwed to the circuit breaker. It's possible that there's a loose connector where the converter plugs into the power distribution system or, if your specific converter is "hard wired to the power distribution system, that one of those screws is loose....
Unfortunately, many "service techs" find a problem (or don't find a problem and change out the major assembly), things work so they stop looking for a second malfunction which, in a few weeks, causes the new major assembly to fail just like the original major assembly failed....
I'd start by unplugging your trailer from shore power, turn off the 12VDC system at the batteries and then spend half an hour or so, on your belly, behind your trailer power distribution center. Use a good flash light, look for brown stains/burn marks on EVERY wire. Check EVERY screw with a wire under it for tightness (and check every wire "stripped end" for pitting, signs of being overheated/melted insulation) and actually put a screwdriver on EVERY screw you see to make doubly sure they are ALL tight.
Inspect the converter circuit breaker by pulling it out of its connectors, disconnecting the wire connections, inspect under the connections for any signs of being overheated and check the black wire connected to the circuit breaker for signs of melted insulation/hot copper wire.
Then, I'd replace the circuit breaker with a new one. If you don't have a new circuit breaker, then swap it out with one of the other circuit breakers in the power center. MAKE NOTE OF WHICH BREAKER YOU SWAP and if the problem moves to that circuit, you've confirmed the problem....
My guess is that if you're on a 50 amp power supply from the campground, and that one circuit breaker is the only one causing problems, there's a "resistance in the wires" being caused by something, probably in a connection under a screw or a bad breaker.
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