I have a 1989 Sea Ray 440 Convertible (the boat kind), and it is having some electrical issues. The air conditioning units used to work flawlessly. However, now that the DC area has gone through one of the hottest summers on record, the rear unit seems to be acting up. We're running on a 12,000BTU forward unit and a 16,000BTU rear unit. The inbound lines carry 110V @ 30A. We have two, one to power all of the regular AC devices, and one dedicated to the air conditioners / heat. The front unit under max load draws 11A, the rear is 16A, and the fresh water pump is 2.1A. Why Sea Ray decided to come so close to the 30A limit is beyond me, but that is another discussion. It has worked fine for 22 years, but now what happens is that either the front or the rear units can be on without a problem, but if you turn them both on the total amperage starts at 27A then creeps up over about 3 minutes until it blows the main breakers at 30A. We've done a lot of diagnosing ourselves, and we've determined that it isn't the main breaker having resistance issues, or the strainer being clogged, or the coils being dusty, or the incoming power sources. I know this is the cars forum, but can anyone help? It's fucking hot :(
is it a multi-temp system or seperate compressors?
It has two totally separate self-contained units, with separate climate controls.
ok, have you checked the boats electrics? sounds like the wiring in the boat is getting too hot from all the amps running through them and that would be why it is rising slowly.
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