Assuming you mean on the meter rather than the IHD … The only thing I can find on this @Robbie4756  is

“Kaifa. If the meter screen is off, press either button once to wake it up. Press and hold the up button, if you have a pin you will need to enter it, otherwise press and hold the up button again. When the screen changes, continue to press the up button until you see “ECR Balance”.

Thanks for the info. It worked a treat. I've been chatting to ovo this morning to find out, but they couldn't tell me that.