My SQ 3-2 pump has operated well for ten years, operating on a CU 200 control unit. It continued to work fine on solar (500 W) or 120V AC generator.. I have replaced it with a new pump (SQ 6-2) because I need more water. The old one worked fine and I am saving it for a spare. The new pump has only a F3 fault reading on the CU 200, both on solar and with the 120 V generator. Any ideas on what to do next would be appreciated.
