Fujitsu Designer ASTG09KUCA (2.5kW / 3.2kW) Questions & Answers

Hi Jim, I don't know whether you can have it installed on the roof, but on reading the installion manual and as I said later to the company that installed mine, the outside unit should of been installed 3 mtrs away from the inside unit and then I would not have the motor and fan noise I experience as they installed my unit back to back. I had the company call back to listen to the noise and install a drian pipe to take the water away so that was fixed the water problem, but I still have the noise problem. Getting back to your roof installion I do not know the what type of roof you have but I have seen airconditioning units on roofs, but I am not qualified to advise you. Sorry I cannot help you with that question.

The 2 times I have had water noise or internal water leak is because the moisture drain pipe from internal head unit to outside was blocked, the other time was the drain pipe was installed above the outlet from the internal unit, which would mean the drain pipe is too high so water built up inside.

Only other thing I can think of is when using heat or cold air, on occasions I can here the fluid (gas) running through the pipes. This is normal and might be what you are hearing. It doesn't happen all the time, but would be more noticeable when you first turn the Air Con on. This sound happens to all Air Con units (well all the units I've owned), it is the gas running through the pipes. Regardless of whether you set the Air con to low noise or not, the gas still needs to run through the pipes to internal head unit to produce hot or cold air as needed.

I experienced the same thing. Noisy water flowing from the inside unit. I rang fujitsu. The guy told me that this model should have a minimum of 3 meter copper tube between indoor amd outdoor unit. I told the installer and he will do it in 2 weeks time. Fingers crossed.
I think this unit is sh##t. It has a high vibration. And i can always hear a sizzling noise when i operate in heating mode. I do have a mitsubishi in my other room. I dont have any issue on it.