If these pool cleaners are moving, there are several suggestions in the users manual. I have attached a copy below in case you didn't get one when you took the pool over. Basically, make sure that your filter ,booster pump, and wall fitting screen are all clean and working properly, check wheel RPM and get it to 28-32 RPM, make sure that your backup valve is cycling, and check all of your hoses and connections for leaks or cracks that would allow air into the line.
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If these pool cleaners are moving, there are several suggestions in the users manual. I have attached a copy below in case you didn't get one when you took the pool over. Basically, make sure that your filter ,booster pump, and wall fitting screen are all clean and working properly, check wheel RPM and get it to 28-32 RPM, make sure that your backup valve is cycling, and check all of your hoses and connections for leaks or cracks that would allow air into the line.
http://www.poolcenter.com/Platinum_Manual.pdf