CIME C0-05 Espresso machine - water output

I am trying to help a cafe who are a potential customer, by checking their espresso machine and grinder. The espresso machine is the model indicated above, but the cafe acquired it 2nd hand and have no manual. I have searched online and contacted the manufacturer, been unable to find a manual and no response from CIME yet. It’s not a machine that I’m familiar with using.

The main problem at present is that the machine is pushing out way too much water - a double shot is about twice the correct volume - and I have not been able to figure out how this can be adjusted. Can anybody kindly shed any light on this for me - how to adjust the settings? Or, if possible, point me in the right direction to obtain a manual. The machine needs further maintenance I’m sure, but as the cafe is in a sporting venue with a fairly large event impending, your help with this would be greatly appreciated.

Many thanks.