I've had my dolphin s300 for about a week now working in the pool and I keep getting impeller #1 error codes.
Also, I have yet to see it climb the walls. I assume it's because te walls are dirty or something but my pool is looking much better now.
Could these be related?! Anyone else having a problem with the bot climbing?
If the impeller is obstructed or impaired (hair or fibrous material preventing it from rotating freely) then you won't have the needed "oomph" to propel the unit up to the waterline. This happened to me once and we reached in with a long-nose plier to pull out the hair (lots of teen girls in the pool). They recommend removing the impeller cover to fully clean, which may be necessary, but I'd try reaching in first.