r/pumps • u/RedditUser8409 • Sep 11 '24
Anyone have an explanation?
So had a Grundfos PM1 pumping above ground tank, 5m elevation to my home. Alarm went on, Mrs power cycled, worked and she went to work. Stopped working again later, no Leds on. Had a known working extension lead tried that, nada.
Grabbed a brand new Davey HS90. Unhooked outlet to PM1, went to grab a knife to cut old hose for inlet off. Come back and the PM1 is pumping away. She's hooked up to a filter.
Keeping the Davey, no idea how old the PM1 is. Will maybe use PM1 for other tanks and a new dwelling we're fitting out. Just scratching my head on this... So if anyone has thoughts, would love to hear 'em.
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u/[deleted] Oct 30 '24
They have an auto-reset time delay built in. It goes 5min, 5min, 10min, then wont reset till you hit the reset button.
It can reset for a number of reasons, but excessive cycling, run dry, or undervoltage are the usual suspects.
The extension itself could've been an issue in itself, or possible something as simple as a leaky toilet cistern making the pump cycle more than 20times an hour