Gen2’s have battram chips on the MLBIII processor board and EEPROMS for software. The same type of EEPROMS are in the OVF30 drive as well.
If you type in otis gen2 adjustment manual in google several results come up on scribd.
You’re going to need OCSS / MCSS / DBSS if you want to be able to troubleshoot these things without help.
