sounds like your HOUSE batteries are too low - both your Generator and your Levelers use the house batteries to operate.
Turn you Charger ON, if you are hooked up to any shore power, or
Run your engine, which may also provide some charging to your house batteries
also, you may have an 'AUX' button at your dash which allows you to jump power from your Chassis battery(s) to your House batteries when they are low and you need to start your generator
'14 Palazzo 33.3 bunkhouse 34' diesel
KingTailgater2 Dish HD, 100w/5a SOLAR, BlueOx
100,000+mi since '14 - US, Alaska, Canada - Hiawassee, GA! (also, '14 Gulfstream Amerilite and '07 ForestRiver Rockwood) : )