A/C pump relay box

[Jus Cruisin]

My front berth ac won't turn on the raw water pump. It runs fine if the salon ac is running. I guess there is a trigger switch? If there is one for each unit I'd like to swap them to see if that's the culprit. I just need to find out where the junction box is located in the boat. 2004 390da for those that can't see info under avatar.

 

[Skybolt]

The main board on the AC itself has an output for turning on the pump, there is also a setting that controls that output. It can be always on or only with the compressor.

 

[Jus Cruisin]

The main board on the AC itself has an output for turning on the pump, there is also a setting that controls that output. It can be always on or only with the compressor.

The a/c has been fine earlier in the season. Just recently did the front start to get high pressure shut downs. Just need to find the relay box to check the trigger switches which are likely the failure.
I did find through searching the 2006 40da has it located behind the main circuit panel. I'll look there later today.

 

[dtfeld]

My pump control relay was behind the salon sofa back under the main electrical panel.

When I replaced my main ac unit, I found the neutrals were crossed in that pump relay box, requiring both units to be wired in order for the remaining unit to operate.

The triggers are replaceable as is the Triac in the AC control box .

 

[Fred]

The a/c has been fine earlier in the season. Just recently did the front start to get high pressure shut downs. Just need to find the relay box to check the trigger switches which are likely the failure.
I did find through searching the 2006 40da has it located behind the main circuit panel. I'll look there later today.

Yes behind the main cabin circuit panel in my boat also. In case you did not know, the whole panel is hinged on the bottom and drops down for easy access. You may have to remove the door to swing it down.