Freshwater Pump Tripping Breaker - 400EC

[Olysan]

Good Morning, I'm having some trouble with my freshwater pump. Last week my freshwater system stopped working. I determined that the pump was tripping the breaker. The pump was looking pretty rough so I pulled it and it seemed to be locked up so I ordered a new pump. Unfortunately the new pump seems to be doing the same thing. Here's what it does:
If I open a faucet it runs well then when I close the faucet I can see on the amp meter at the main panel that the amps start to climb within a few seconds and the breaker at the main panel trips. I can reset the breaker and everything is fine until I open a faucet, then the cycle repeats. Help!

 

[The crime scene]

Good Morning, I'm having some trouble with my freshwater pump. Last week my freshwater system stopped working. I determined that the pump was tripping the breaker. The pump was looking pretty rough so I pulled it and it seemed to be locked up so I ordered a new pump. Unfortunately the new pump seems to be doing the same thing. Here's what it does:
If I open a faucet it runs well then when I close the faucet I can see on the amp meter at the main panel that the amps start to climb within a few seconds and the breaker at the main panel trips. I can reset the breaker and everything is fine until I open a faucet, then the cycle repeats. Help!

I don't know your boat. I have a 480DB, but had a 400DB a few years ago. I would guess you have two pumps on that size of boat. Check for a second pump. My 480 has two pumps and they are not on the same breaker. I cannot remember if the 400 had two or not, but I think it only had one water pump breaker though. Just a shot in the dark on this one. You will get an answer though.

Keith

 

[Sam Worsham]

It could be the pressure sensor is set too high and the pump is working really hard to make pressure. I just upgraded to a new pump and it has adjustable pressure on the front plate.