Water in at the bottom of caddy, you need to see a yellow light flick on then off, if it stays yellow machine is in reverse, so flick the red switch over if need be,turn water pump to hand position and fully open wash out tap so you get a good flow of water then close tap off this bleeds air out of system, take blind cap off front of machine and press water button and set water to required amount if you don't know then your better off starting around 400, let water come out of the outlet on mixing zone replace blind cap and run machine just so you see water come out of bottom of R&S then stop machine and remove blind cap and top water back up, this primes the R&S, switch water pump and star wheel to auto position place a bag or bucket with hole cut out over hose connection at front of machine and run machine adjusting water til you get consistency correct, wet hose and set spray gun, and connect to front of machine, switch compressor to auto press green button and open tap on spray gun and off you go