Rooftop AC Tripping Breaker... Sometimes
I have a 2001 Monaco Knight with 2 Dometic Duo-Therm AC units. The Rear air works fine and the front has started tripping the breaker. I have cleaned both sets of coils, replaced both capacitors, r...
Forum Discussion
One thing to check and be sure of is the electrical supply both to the A/C and back on the neutral wires. It is a heavy load on the connections, and having a loose screw holding down wires is a real possibility when things don't seem right.
A very useful tool is a laser dot thermometer. Point the dot on the screw terminals and if you see heat buildup at any point, it is likely a loose connection.
Definitely get a voltmeter and put it on the supply terminals on the shore power. If your connections are good, you should have the same, or very close to the same voltage right at the A/C. If not, then you are losing some along the wiring. Continue checking with your meter on the panel board.
Sometimes the way to prove good solid wiring is to have an extension cord set up. Plug into the shore power, and at the other end, connect to your A/C. If it keeps running then, but won't keep running through the rigs wiring, this proves the A/C itself is good, but the wiring to or from and back to the neutral is suspect.
A very useful tool is a laser dot thermometer. Point the dot on the screw terminals and if you see heat buildup at any point, it is likely a loose connection.
Definitely get a voltmeter and put it on the supply terminals on the shore power. If your connections are good, you should have the same, or very close to the same voltage right at the A/C. If not, then you are losing some along the wiring. Continue checking with your meter on the panel board.
Sometimes the way to prove good solid wiring is to have an extension cord set up. Plug into the shore power, and at the other end, connect to your A/C. If it keeps running then, but won't keep running through the rigs wiring, this proves the A/C itself is good, but the wiring to or from and back to the neutral is suspect.
