I have an older model OPC30TT that is popping an "Error Code F1." What's this mean?

The first time you turn the key you get the error code.
If you reset the key and turn again you get the error code and the warning tones.
If you reset the key a third time the lift runs through it's checks and operates fine.

We're trying to decide if the machine is worth bringing a technician out to fix.

Also, does anyone know the sequence to get into the settings menus on this lift? I used to know it.. it was Lift Up+ horn+ drive forward... or something like that.

Thanks in advance for any help!