Water leaking inside from the AC

[HDRider]

Our Oliver is a 2023 with the Truma AC.

 

If you live in the south you know how hot and humid it is right now.

 

I turned the Truma on about noon today.   I went out just now to turn the AC off and water was leaking like crazy inside luckily falling squarely in the aisle and not on the twin beds.

 

Does anyone know why this is happening?  It has never happened before.  I routinely run the AC when we are home and the Ollie is docked.

 

Thanks

Edited July 30 by HDRider

[John Dorrer]

Drop the nose a little.  Is it dead level now?

[Rolind]

Based on my recent Truma dissection and research, I am suspicious that your condensate lines are at fault. The Truma has a pan under the evaporator to collect condensate.  The pan has a drain and overflow on street and curbside. It is designed so that if the condensate lines become occluded, the condensate will pass through the overflow and onto the outside of the trailer.  If both the condensate drain lines and the overflow are occluded, I understand that the condensate can drain into the trailer.  Furthermore about a foot from the evaporator pan, there is a connection where the condensate line from the pan connects to the condensate line in the trailer. Again, based on my understanding, if this connection fails, water can then drain from the unit into the trailer.  
I hope this is clear and helps.

it isn’t too difficult to investigate these  issues further but it does involve an hour on the roof of the trailer, a T25 and T30 driver and some sealant to reseal the shroud cover screws after  reinstallation.  

Edited July 31 by Rolind

[DavePhelps]

I don't have the Truma, but on mine, the condensate line at the AC was not hooked up at the factory.
I'd pull off your interior cover and see if yours has come loose, or was overlooked at the factory.
Easy fix if that is all it is.
Good luck.

Dave

[Patriot]

Here is some info that may be helpful -

 

[HDRider]

11 hours ago, John Dorrer said:

Drop the nose a little.  Is it dead level now?

The nose was down.  I raised the nose and the leaking stopped.

 

I find it concerning that the angle of the trailer, ever so slight, could cause this.

[HDRider]

11 hours ago, Rolind said:

Based on my recent Truma dissection and research, I am suspicious that your condensate lines are at fault. The Truma has a pan under the evaporator to collect condensate.  The pan has a drain and overflow on street and curbside. It is designed so that if the condensate lines become occluded, the condensate will pass through the overflow and onto the outside of the trailer.  If both the condensate drain lines and the overflow are occluded, I understand that the condensate can drain into the trailer.  Furthermore about a foot from the evaporator pan, there is a connection where the condensate line from the pan connects to the condensate line in the trailer. Again, based on my understanding, if this connection fails, water can then drain from the unit into the trailer.  
I hope this is clear and helps.

it isn’t too difficult to investigate these  issues further but it does involve an hour on the roof of the trailer, a T25 and T30 driver and some sealant to reseal the shroud cover screws after  reinstallation.  

That sure sounds like the problem.

[HDRider]

10 hours ago, Patriot said:

Here is some info that may be helpful -

 

Funny you post that.

 

Last summer my AC was dripping down the front street side corner.  Oliver blamed that on the angle of the trailer.

 

Something is fishy.

[Rolind]

I think that @Patriot comments in the above mentioned link are most appropriate. The condensate lines cannot be kinked. It is pretty amazing that the lip in the condensate tray between the drain proper and the overflow is only a few millimeters at best. But having said this, if both condensate lines are draining well no water should drain down the side of the trailer or into the trailer regardless of the leveling of the trailer. I will say that I was afraid to really blast the condensate lines with high pressure from below, to prevent separating the connection in the lines I mentioned previously. I had already sealed up the unit before I applied the compressor to the drains under the trailer. 

[HDRider]

I took the inside cover off this morning.  Both drain lines are well connected.

 

Most of the time water drains out just fine. I do not consider the drain lines at fault.  I think it is the pan.  Is there a pan?

 

I think the drain (pan?) is very sensitive to the fore and aft angle.  It feels like the trailer has to be very level to drain correctly.  I might consider this degree of sensitivity a design flaw. 

 

Looking at the drawing in the manual provided by Oliver, the AC is meant to drain out on the roof.   Has Oliver tried to overcome that with the drain hoses?  Is there even such a thing as a drain pan?

[Rolind]

So I think the Aventa is designed to drain condensate onto the roof unless the option condensate drain kit is installed, which is on my trailer. I regret I didn’t take any pics when I had my cover off but the picture from the manual may help. You have been in your unit so hopefully you can decipher the image. The upper image is looking down on the unit and there are two small holes marked 1 and 2. The oval hole (1)is the overflow and the round hole (2) is the opening to the condensate drain tube if installed.  The lower image is looking at the unit from below and cannot be seen with the Aventa installed as the lower surface is only an inch or so above trailer shell. The short quarter circle track leading from (1) on the lower image, is the track of the optional drain tubing.  I agree that the condensate pan is very shallow and it is not how I would have designed the system.  Because the pan is shallow and the ridge between the round condensate drain hole and the oblong overflow is only a few millimeters, the drainage is very sensitive to leveling of the trailer. I also think that level for my Aventa and level for my trailer are slightly different, just for added complexity.  Despite my pledge not to, I suspect I will probably take another run at getting my port side drain unobstructed.  On the other hand, I am delighted that this is my only complaint regarding my Oliver. What a fantastic trailer.