Got a tac 32 mrl endura has a Bucher lrv 700 valve unit is really jerky on ascension in inspection and leveling. Adjusted parameters for inspection speed on the mini terminal to no avail. Had a shutdown this morning 1074 low pressure. Unit was installed in 2018.

I had one do that because the charcoal vent plugged so the tank couldn’t get air. But with low pressure
I would check for a bind in the hoistway. Maybe a leak in the tank at the motor, but be careful.

Check z44 parameter..set it to 100 if not already

I had a hydro do this on jack resync ... software issue

Sometimes a power loss brings this up, I had one that also tripping the overspeed valve in the down causing a 1074.