Did you get a controller that says "240V" on the box? (You should have).
If so.. it should already be setup to run on 240volts.
You will just need to find a new IDC power cord that will work with your outlets.
If you don't have a 240v controller on the box, or want to check.. you can remove the 4 bolts on your control box and check the power supply. There will be a switch on the inside that says either 120 or 240. Make sure its set to your local power supply configuration.