Firstly switch off power.
Remove the lid of the filter.
Top-up the filter with water.
Pump Up sand a debris three quarters of the way.
Ensure not to damage any filter components.
Pump sand/debris into a separate container.
If pump “sticks” then you should pump up water to fill the pump.
Fill filter with sand, as per instructions on sand bag.
Backwash and rinse.
Enjoy your pool.