You sure itís pumping water
? Cause I think that is an actual over pressure alarm
, meaning of course no or not enough water flow. My pumps are a bear to reprime, they wonít pull water an inch.
To flush hook up a garden hose and let it rip. If it gets bad I fill a 5 Fl bucket with muratic acid and water and let flow around in a circle.
I have only done that once, and probably shouldnít have then.
You canít hurt it by pumping water backwards or forward, itís just basically an open pipe, surrounded by another pipe with refrigerant in it, the water section is just open. The compressor
doesnít need to be running for a flush, but likely a flush wonít accomplish much, but doesnít hurt to try.
I have primed my system by putting a garden hose on the discharge thru hull
and pumping water backwards, then of course turning the system on.