I had the same problem earlier this Fall and found the answer at Lippert's website.
• All LCI 12VDC electrically operated slideout and hydraulic pump unit motors are designed to work off of the coach’s battery system.
• All LCI 12VDC motors require DC or Direct Current to operate properly.
• Batteries must be fully charged and indicate at least 12VDC minimum under load for proper operation of all LCI 12VDC motors.
• The AC converter is a charger that “converts” AC or Alternating Current into a DC charge to keep the coach’s battery system fully charged.
• Utilizing the coach’s AC converter to operate the slideout or hydraulic motors will spike the amperage and potentially cause motor malfunction.
• Normal operating amperage is between 20A-25A and can spike to over 50A in low voltage conditions.
• Chassis ground wire connections must be made as a metal-to-metal contact between the chassis and the toothside of the star washer. Paint or other undercoating between the star washer and the frame may result in a poor ground connection.
So, check your battery voltage. Your battery runs the hydraulic motor for the slides. Your converter charges the battery back up.
Pat & Karen
2012 CC Silverback 29RE
2013 Ford F250 Lariat, Crew Cab, Short Bed, Diesel, 4WD
Retired and trying to travel where it's warm.