Sunsun HW-5000 E21 problem solved

So I decided to do what most of us don’t do and referred to the owners manual. In there I found that there is actually a process that you have to go through after replacing the UV bulb in order to reset the hours used of the bulb. The way it’s written in the manual Is wrong tho. Luckily I’m a bit of a getterdun type of guy. So I keep messing with it until I figure it out. 1- After replacing the bulb hit the video button so it shows the hours you have it set to operate. 2- Push and hold the UV light button for 3-5 seconds until it shows you the hours your bulb has been used. ( mine was 2077) 3- Push and hold the ⬇️ button until the hours reset to zero. 4- hit the power button until it cycles back to the power output number and now you don’t get the E21 code flashing anymore. Hope this helps some of you out there.