I had this happen on my Sunova many times. After bringing it the dealer when I first got it and nothing was wrong I was shown how to reset the unit by pushing the ENTER and RETRACT buttons in at the same time. It starts out with jacks down light (when you know they were up) and then retracting Jacks and then you get a retracting timeout then the service message. I find this only happens when it is cold out. Sometimes just running the coach for 10-15 minutes makes it go away. A while back on irv2.com someone posted a link to the Lippert Jack manual which illustrated the use of the reset button. I don't have the link. I've been resetting the jacks for three years with no issues.
Bob and Cathy
2015 Itasca Sunova 33c towing a 2008 Jeep Wrangler Sahara
Member FMCA F421963, GS Life, SKP#127220, WIT, PA,