Have a 112' motor yacht. Two fresh water pumps made by Headhunter. Pumps turn off, at the pump, at any given moment. Accumulator tank is fine. Ongoing issue for a year... Any thoughts??
Call headhunter. They have a great customer service department. Sounds like you may have an air leak on the suction side or suction hose that's collapsing or blocked at times, maybe even a clogged tank vent.
Sounds like an air leak. Start by purging. Full tank. Open 4 or 5 faucets. Turn on one pump, let it build pressure. Turn off the breaker for 10 seconds. Turn it back on. Repeat 6 or 7 times Procedure is described on the web site. Repeat with the other pump.
Humm While accumulator tanks are nice to have, this pump usually works great with-out one. I'm wondering it the tank is covering up an issue, still a low side air leak. But, If it's working, My next comments would be; Never kick a sleeping dawg.. Go and have more fun..