Lifttronic NewlLift DRM fault - how to drive?

Hi I was wondering if anyone knows how to drive a lifttronic newlift with a drm fault.

DRM is the encoder

The lift is over the top and I want to be able to drive it down. With bridges on the top limit and safety circuit closed it won't drive.

Is there some sort of open loop mode I can use to drive without the encoder?

It has a unidrive

Which version of newlift controller

It is an FST controller

I found some data online had a quick look and found this. Parameter 0.48. Hopefully I can try this today.
https://drive.google.com/open?id=1rjKSTY45HHwab_e96tb1yJqV3toceUda