Model JPX-300H, the unit does not fill, but it

the fill valve is easy just take the coil off and there is a hole in it put a metel screwdriver in the hole and turn the unit on if it pulls the screwdriver like a mganet it works is more likely i bad diaphram now as for the draining it drains bu turning a valve dirverting the watter from the pump down the drain hose so you must have a hole or leak in the hose