if default passcode does not work to get dash access then it has been changed by dealer.
the only other way to gain access it by laptop program.
you will have to call dealer to access it and run diagnostic

I Seyit from the turkey.
Available from ERP30ALF model of the above machine.
Both walking and hydraulics do not work on the machine.

There is no fault code on the screen.

Do you have a password other than......five five five for on-screen settings?

Where may this malfunction be caused?

Code 52 Line Contactor driver shorted on start up. Check power cables going to motor, make sure all connections are tight and cable has not rubbed a hole against the frame. Verify all wires going to contactor are good. Verify all switches are working correctly, ie seat switch, park brake switch, throttle switch. Should all check good, suspect controller failed. Need to check with program before replacing or swap with sister truck.