My RV ac is not working

SOURCE: Circuit Breaker and Dometic Rooftop RV Air

Since your RV A/C works O.K. when plugged in to the land line and the trip happens when you run it on your generator the problem may be related to the generator output. It is possible that the power being supplied by the generator is not handling the surge when the A/C starts. Starting Amperage on start up is about 5 times the running Amperage for about 3 seconds until the compressor comes up to its rated speed.

SOURCE: PROBLEM WITH DOMETIC RV ROOFTOP AIR conditioner

Check at the compressor terminals between the Red and the terminal for the overload protector to see if you are getting power to the compressor on startup.

SOURCE: carrier air-v AC is not blowing cold air

There could be a freon leak, or just low freon levels. If this is the case, you have to call a certified a/c technician to recharge your system.

SOURCE: RV air conditioner. Compressor running, fan stops before cool

The fan motor is getting hot and going off on the internal overload in the motor.
This is caused by either a low voltage, a bad capacitor, or tight or dry bearings in the motor.
To check the bearings turn the power off to the unit, then spin the fan blade if it spins freely then the bearings are ok.
To check the capacitor you will need some kind of tester or you can buy a capacitor and replace it, that's what a lot of people do. They usually don't cost very much.
To check the voltage you will need a voltmeter and measure the volts at the unit.

SOURCE: air is not very cold on a rv roof top ac what

You should have the manual for this unit handy and as far as recharging tools go. You only need a can of R134a *(if the unit is R12 you need to buy upgrade adapters since R12 is no longer sold) Run the unit and put the R134a filler line on the low pressure side of the compressor *(from manual...dont guess as trying to charge the high pressure side is VERY dangerous). Get the charge just into the Green zone on your charger and that is it! Try not to fill too high in the green zone....I know it sounds funny...but AC's usually work better when they have the low end of their optimum fill. R134a doesnt work as well as R12 so be sure you buy the R134a with cooling enhancers. Your local Autozone can guide you to the right filler/product combination.

Good luck and be careful!