Welcome to the forum!

Thanks for the pics, they help!

You've got a Hayward SuperPump and what appears to be a DE filter (Jan, DE filters' multiports are plumbed 180* backwards from sand filters' - because De filters are fed from the bottom and sand filters are fed from the top )

Please see this post for some basics on using a DE filter.

I'm wondering if you have added DE to the filter, though - perhaps it's a multiport issue, does water come out of the 'waste' port when it's set to 'filter'?

I hope this points you in the right direction, feel free to ask follow up questions