Hi

To set the clock:

1) Truck switched OFF.

2) Press & hold the direction switch towards the forks.

3) Turn the truck ON & watch the dash display, when it shows Cl release the direction switch.

4) Use the LIFT joystick to change the hours, then use the direction switch to swop to minutes, use the lift joystick again to change the minutes.

5) Turn truck OFF & time will be set.

It sounds like the weight function needs to be recalibrated, you can only do this with a BT CAN service key plus a test weight you know the weight of.

The roof display for height counter only normally works ( displays something ) once the fork carriage is in the main lift, they don't normally work in the freelift area.
Truck would need a height counter pulley on the mast to work this display, it's at the top of mast with a thin metal cable running down the middle to the bottom.