Per this
*POST*, here is the procedure to reset the error code.
We have a 2016 HC 375FL. Yesterday we had a error code on the level up system after many hours of trying different things , reading the manual and looking on the internet here is how to clear the error code. This is for the electric jacks
1. Hook up truck
2. Retract all jacks ( you need to use manual mode)
3. Extend all Jacks at least 6" ( for the middle jacks, press right and left at the same time)
Now that all are extended , press and hold retract button until all jacks are retracted.
4. At this point the error code reset and system was back to normal.