The fix is easy.
Rv roof ac drain off roof.
There are no drain lines for the ac unit on the roof of the rv.
The condensation drips down into a pan which has an outlet on the side of the base pan that lets the water run onto the roof.
Which ideally should drain the water from the evaporator coil on the roof instead of inside of the rv.
If it is leaking inside you most likely have a clogged outlet which can be easily opened with a stiff wire probed in the drain outlet.
How to clean the drains on you rv roof air conditioner so it doesn t backup into your rv.
At roof top level remove the shroud covering your a c unit.
Turn off the air conditioner unit.
Typically a few screws or nuts hold it in place.
One of the most common causes of the water leaking from air conditioner in rv is drain pan not able to drain the water properly.
The moisture that is removed from inside the rv must be relocated to the roof of the rv where it usually evaporates.
On very hot and humid days well over 35 of the energy used by the roof air conditioner is for moisture removal alone.
I would suggest taking off the exterior shroud and metal evaporator shield and cleaning the drip pan and checking the drain holes.
For safety sake put a lock out tag on the switch or thermostat to warn others not to turn it on or better still disconnect the power to the rv.