I hope someone here can help me. My wife and I live on a small sailboat. When our refrigerator and freezer began to have problems, we sought the help from a recommended refrigeration technician. He said he needed to remove everything to bench test at his shop. After two months of living out of a cooler and no answers to our phone calls/texts/emails, we threatened with legal action. Shortly thereafter, he returned everything to us - in a box! I was able to hire another technician to put most of it back together, but he can't figure out how to make the water pump work.
We have two compressors, one for the refrigerator and one for the freezer. We use sea water (raw) to cool the refrigeration's condenser. We have one pump that circulates the raw water. What we're struggling with is how to wire it up so that regardless of which compressor is cycling, the raw water pump runs. Of course, it was working fine until the 'recommended' technician tore everything apart. We have a series of relays but we aren't smart enough to figure out how to wire them. Each compressor outputs 12VDC when the compressor is cycling for the purpose of powering a pump.
Any help would be greatly appreciated. Happy New Year!