OK:
Press spanner button for 10 sec til lights up orange
It will say 1.a in the display
Press "eco" repeatedly til this says 5a
Press chimney sweep (man with ladder) button once, it will light up
You should see 00 in display
Press "eco" once, won't do anything but press anyway
Now press and hold chimney sweep til you see [] in display.
When you see [] let go.
It will go back to 5a.
Now press spanner once to get back to normal mode.
Voila :)
BunSlinger, October 2008