The problem you may run into, depending on the distance you are going, is voltage drop.
Lower voltage requires more current to do the same work, so the AC extension cord carries considerably less current than the DC cord does. Current is like flow-rate, so pumping it through a wire that is too small is inefficient. That's why overhead power transmission lines run at thousands of volts and are stepped down to 220/110 right outside the house. Pool cleaners are usually designed to run the AC as close to the pool as possible to minimize this voltage loss.
One of the bad things is that a DC motor running on low voltage draws more current than normal, and they then tend to get hotter than normal. (may not be an issue with a water cooled motor)
The bottom line is that you need to know what the voltage is at the cleaner's connector (while it is cleaning) with the normal connection scheme and with the new one. Without a doubt, you should choose larger guage wires for your extension.
Bookmarks