Air Conditioning Power Problem

[whoover]

Ryan my 42 is set up the same as yours. When it's as warm as it has been here the last while I will trip the main breaker for the two units. One is the original cruise air 1973. I also have a cockpit beverage cooler on that service that can draw a load. Worth a look to see if anyone has added anything to that service and not fed by your ships service cord.

Did you get your mufflers addressed, I just changed both exhaust hoses and I found I'm not bendy anymore!

Walt Hoover

 

[SeaEric]

It's close. A bad connection, low dock service, tired compressor, something else on that fuse drawing some extra amps (raw water pump, added charger, ??), bad compressor start cap.

Hard to do, you have to watch your amp meter and determine how much current you are (trying) to draw.

Wonder if you could run fine on your gen-set.

Just had an event a couple of nights ago on our boat. One of our A/C units displayed a L/AC error. Low electricity.
Not in a hurry, I just turned the display off (Passport I/O). I'll get to it later.....
That night, I noticed our lil get-set cycling a load about every 20 seconds, WTF.
Did not stop till I opened the breaker to that faulted A/C unit.
Yep, Bad cap.
When you turn the op panel off, one side of 230Vac (115Vac) is still hot to the equipment.
On a 30 amp / 115Vac shore power supply, this would of popped a fuse in a NY Second.

Why I mentioned this, After checking your shore service connections (Inside and outside), do not rule out things you don't usually think of. A boat is full of surprises.

Capt Ralphie is correct. When (dock) voltage goes down, amperage goes UP.