"HHH" is for Hot, Hot, Hot!
Mark, I think your problem is easily fixed. If this is the first time that you have used your AC since putting your boat in the water this spring, then the problem is that the AC water pump is not primed. The 120VAC water pump is located just under the waterline and I find that it does not self-prime. It is not your average rubber-impeller type of pump, but rather a centrifugal pump. These pumps MUST be below water level AND full of water before they will pump at all. One method I have used to prime the pump is to disconnect the hose from the filter, open the seacock and let the filter completely fill and purge of air. Bring a water hose from the dock down into your salon and put the nozzle of the hose into the hose leading to the pump and ACs. Put a small flow of water into the pump and ACs, this will force any air out of the pump housing and fill the water lines to the AC condensers. Shut off the hose, and with the seacock open and water running out of the raw water filter, push hose back onto the filter. Now the entire system should be filled with water. Turn on the AC and get cool! The 'HHH' is the fault code that is displayed when the condenser overheats due to lack of water flow from the pump. If left on, the system will wait 2-4 minutes and try to run again. After a minute or so it will shut down again. The reason that you had this problem last year and this year is that when the boat is put into the water, the AC cooling system is air-locked and the pump runs but will not displace any water. After priming once, you will be OK for the season. Next year expect the same problem because air will have gotten into the system at haul-out. BTW, if you see the 'HHH' during the season, check your raw water filter for plugging. It means that you just aren't getting enough water to the units. Rich
