Turn off AC breaker to AC unit, unplug from shore power, turn off generator. Momentarily short capacitor terminals to each other using an old screwdriver, you might get a spark. No big issue, you just want to try the screwdriver trick first, so you don't wind up blowing yourself off the roof of the RV. Capacitors will self-discharge after a time, but I don't know how long that takes. Be careful up on the roof!!