We have a newly commissioned 8 Kva Quattro in which the power ON/OFF switch (black button at the front of the unit) is rather stiff - it needs a sort of flat tool to be able to fully push in the button to bring the unit on.
Everything else works fine otherwise.
What can be done to fix this button? It is a lot of annoyance as one finger alone cannot switch on the unit - always needs a pointy or flat tool to push the button all the way in/up for the unit to power on