eed080b5_ol_cleaners____The_PoolCleaner__Solution
[Possible Cause] The three way valve may be in the wrong position. [Video] . [Solution] 
If you have a designated suction port, divert suction away from your skimmers or maindrains to the suction port. If you are using the skimmer divert suction away from the maindrain to the skimmer.
Tech Support- Automatic swimming pool cleaners -- The PoolCleaner
Solution