Frigoboat Troubleshooting

[islandrunner70]

Hi all,

This weekend my fridge stop functioning. The compressor would start then stop after 30 seconds. Now only the fan motor spins, though not as fast when functional, but no cooling. I am not sure if it is the compressor or controller.

The boat is an Oceanis 370 1993 and the frigoboat is original.

I haven't found anything online for diagnosis and I can't find the details on the controller.

Attached are some pics.

Any help is greatly appreciated.

 

[Benny17441]

Check the voltage at the terminals of the controller, if the voltage is too low (10.4V shutoff) (11.7V restart)or too high (17V) the compressor will be shutdown by the controller. If compressor does not start the controller will enable restart routine every 45 to 90 seconds. If compressor speed falls below 1900 RPM the controller will stop the compressor. If the current draw across the fan terminals exceeds 0.7A the controller will stop the compressor and go for a restart in 45 to 90 seconds. If the heat sink on the controller exceeds 212F the compressor will be stopped. A system low on refrigerant will cause a compressor shutdown. I mean anything can go wrong on a 25+ years old unit but hope these excerpts from a frigobot manual may help diagnose the problem. Does your controller attempts to restart the compressor? If voltage is in range between 11.7V and 17V the controller should attempt to restart the compressor. The best thing might be calling a refrigeration technician.

 

[DougM]

I have one question looking at your first picture. It appears that you do have a black wire going to the negative terminal, but normally the wire to the positive terminal in a 12v system is red. Are you using a white wire all the way from the circuit breaker to the positive connection on the fridge? Just checking.
Also the picture shows a socket for an automotive type fuse, if that is only protecting a part of the circuit, it could be blown. If its protecting the entire fridge that would not be the culprit.