Cruisair trouble

[2big2small]

I have a 3-zone cruisair airconditioning installation. One of the 3 display units in the cabins was dead so I swapped it to another location where it does work.

I then followed its cable to this box (first picture below) in the stern. I opened it up (2nd and following pictures) and verified that the logic board in there does receive 220 V.

I can’t yet exclude there’s nothing wrong with the cable to the display unit since I don’t have a spare one to test with but looking at the connectors it seems highly unlikely. They show no sign of corrosion or ill fitting. I would therefore suspect that logicboard (or the metallic cylinder next to it) in the first place.

Anybody has experience with this and can tell me what to measure and how, so I can narrow things further down?

(And does anybody know how to wire a spare cable in the 6 pin RJ12 connectors so I can make a test cable to exclude that for sure—assuming I can find the connectors here?)

Thanks!

[Bleemus]

The cylinder is a capacitor. Very easy to test with a multimeter. Youtube has many vids on it.

[rolandcavanagh]

I would suspect the cable, either it is cut or an end connector is not attached properly. Next would be to look at the receptacle the cable plugs into on that control board (try plugging the suspect cable into one of the other receptacles).

The problem is not with that capacitor. The compressor wouldn't start at all if it is bad.

Happy hunting

[2big2small]

All connectors and components are too far apart to simply swap things around and I can’t possibly start pulling the existing cables, which is why I’m looking into making my own.

[Outlaw7]

It is just a telephone cord 6 pin if I remember correctly but a cat five cable should plug into the socket.

[Outlaw7]

It is just a telephone cord 6 pin if I remember correctly but a cat five cable should plug into the socket.

[2big2small]

So I got all the bits and pieces and a crimping tool and made myself a 6 wire “phone cable” yesterday. I used it in a known good location where it worked, and then it didn’t work in the faulty location so I can now reasonably exclude cable issues and the conclusion is that I have a faulty logic board.

Now could this be something silly like a fuse on that logic board (pictures in first post)? Or perhaps another typical issue for these particular boards? Anybody has any experience with these?