Samsung Eco 12 Air Conditioners: Strange Humming Noise During Silent Mode Operation

Good morning,
I am asking you for help regarding the title air conditioning. A month ago, I installed two Samsung Eco 12 air conditioners (one per floor) in my home. I have a separate cooling unit for each air conditioner. One of them seems to me to be malfunctioning. Air conditioning allows you to set the so-called silent mode (light cooling airflow), which we use mainly at night. Unfortunately, when the air conditioning is turned on, we hear a strange humming from the aggregate lasting about 2-3 seconds. It's hard to describe what this sound is, but it reminds me of the sound of the loudspeakers twisted for a short while. This sound is more audible than the air conditioning and its repetition causes irritation, it is difficult to fall asleep. I would like to ask for your opinion on this matter. I have the impression that everything was fine after installation. Air conditioning is under warranty, but I prefer to ask people who have knowledge in this topic in advance to prepare for a conversation with the person who installed air conditioning in my home. If this is not a normal symptom, I would rather avoid being told that "it just has to be this way". Thank you in advance for your help and feedback.

You can record an audio. Write a little more about installation length, height between devices. Which are higher and lower?

Condensate is drained by gravity or with a pump?

Today I took more time to locate the problem and it worked. The problem, however, is not the unit, as it initially seemed to me, but the condensate pump. It is installed in the attic directly above the air conditioner. The distance from the air conditioner is a maximum of 50 cm in my eyes. Only the wall to the attic is between them. The pump hums approximately every 25 seconds. I don't know if you can provide links here, but I made a short video. https://youtu.be/db88dMRlAFc

I wonder if the pump is damaged, is something incorrectly connected, the humming is really spreading through the rooms and as I wrote, it occurs about every 25 seconds.

Drain pumps are like that. Isolate it from the ground with something soundproofing.

Except that at this point, the jiz is not sticking to the ground. She is suspended in the air, and the hum is still amazing. Wrapping her in some rock wool can help? Could such Java noise pump be damaged? I can hear her hum even outside the house.

The pipes can be so stiff that the noise is transferred to the building structure. The pump can be "cheaper". Maybe something was damaged or clogged up.

You need to get to the float and clean its container.
It's probably under the cover of the air conditioner. Follow the pump suction tube. If it does not help, the pump will be replaced.
Pumps make noise when running dry. The rest then overheat.

Thanks for all the answers.
Generally, as I thought, I will have problems with the installation contractor because for almost 3 weeks I have not been able to make an appointment with him at home, it is difficult to contact him by phone (my calls are not answered, no contact from the other party). After the conversation, which we finally managed to have and made an appointment, no one came again. Today, during a telephone conversation, the contractor raised doubts as to how it is that after the installation (which took place a little over a month ago, I did not hear it, and now it suddenly bothers me). I don't think I will be able to settle it with a normal trick and I will have to pursue my rights by legal means. I would not like to fumble on my own, lest there be any bases to convince me that I broke something myself (although the contractor already suggests that the pump was positioned differently during the installation).

As they say, the cheapest offer wins and then there is no money for guarantee visits.

It was not the cheapest offer, probably a normal market price.

Well, then you got a strange installer. I cannot imagine myself in the role of such an installer. Good luck

In general, I cannot imagine myself either. I am a programmer myself, I make mistakes, but when they are reported to me, I am ambitiously doing my best to remove the stain as soon as possible.

The pump is .... "Designed in France". Does this tell you something?
The condensate pumps are diaphragm pumps driven by an electromagnet. Each one more or less, but it makes an annoying noise. And when it is mounted in a sound box, it is a nightmare.
Take the hose to some container. You will have a wash and go. Quiet and water to the flowers ...

That is, this condensate pump is the discharge of the condensate to the outside.

What do you mean?

Continuation of adventures regarding my air conditioning installation (its installation was supposed to be a relief on warm days and due to the noise I turn off the device, because I go out of my way when I hear the pump working.

2 days ago a gentleman, whose company installed air conditioning, came to me. Generally, the position is what I expected, meaning "it must be like this, this is how the pump works". I read in the network that the 21 dB noise it emits should be audible from a distance of 1 meter. Despite the damping of the purchased material and sticking some rubber on it by the installer and wrapping everything in a towel, closing the attic, I still hear the pump operation every 25 seconds when I sit on the ground floor (the pump in the attic).

I am deeply convinced that this is not how the device should work and either it is damaged, or some error has been made in the installation and, for example, the pump is running dry (although there is water in the pipes). I read in forums that this is often a noise problem.
I promised myself that this time I would not let myself be persuaded that it was just what it was supposed to be and that I would fight the installer to solve the problem.

Thus, I am asking you for help / advice, what is the best thing to do in this case, what letters to send, or to make an appointment with an expert at this stage? I tried to find the pump manufacturer's website, but to no avail (siccom). I present photos showing how the pump was muffled by the installer, as well as a link to the film, where you can still hear its noise (although slightly muffled, by a layer of rubber glued to the pump).

https://youtu.be/v2k5GCa9oas

I think the OSB board visible in the photos resonates. The sound insulation is very symbolic.

When I saw how it was extinguished, I figured it out a bit myself, but unfortunately it does not give anything, even wrapping the entire pump tightly in the purchased soundproofing material, the noise is clearly audible (so much that I turned off the air conditioning completely yesterday so as not to get nervous). Is such a pump work as shown in the video is normal?

This is how the drain pumps work. And my friend got very allergic to this noise. Things like pump assembly and its downsides are decided before assembly. Also now it would be necessary to convert the drain into gravity and that's it.
And the water is also great at transmitting sounds, so you can stick to the pump as much as you want.

Exactly in this situation, only a tablet of xanax before starting it will help.

Good morning everyone,

quite old topic. I have a similar problem but a bit different. What is it about. I have very good Blue Diamond drain pumps installed. Replaced by air conditioning service technicians - I can not complain about the service. After installation, the pumps were practically silent. And now there are times when they walk so quietly that the humming fly is louder, and there is a moment when they rattle in low bass like in the video posted by @ AdvocatusDiaboli1984. Sometimes louder, sometimes softer. During the day it does not bother us completely. But the problem starts at night, because that bass rattling sound just wakes us up. Even when we turn off the air conditioning 2 hours before going to bed, something accumulates on the evaporator and the float seems to react, which results in switching on the pumps, e.g. at 2 a.m. for 2-3 seconds. The sound is loud and you can hear it all over the floor because it is carrying it along the walls.

Together with an air conditioning company, we are simply looking for a solution.

So far, we have installed the pump slightly below the float, so that it is always flooded with water. Can I give a longer hose between the float and the pump? I have noticed that you can hardly hear it when it works wet :-)

Maybe the matter of a dirty float, or maybe it can be adjusted so that a larger amount of water results in starting?

I'm guessing, but at the moment I decided that the appearance is of less importance to us, if we could manage it somehow, I think even some plastic container under the module on the wall will not bother me: p

If the appearance does not matter, drain the water by gravity, make furrows, then fill everything. Or, do not make any furrows and run the tubes down the wall. Are aspen blue diamod pumps a good choice? I would have a lot of discussion here. There is also the issue that before turning off the air-conditioning, you should simply dry the evaporator, i.e. turn on the air supply itself, good brands have such a good thing as standard and from the automatic machine.

What would you suggest as a better pump? I was told these are very good.

On forums such as, for example, Electrode, we do not call ourselves Pan, Lady, because you never know who is who I can be a woman at the age of 20 ?. It is necessary to return directly after the nickname or first name. After 20 years in the profession, I will say yes, THERE ARE NO PERFECT PUMPS A push-up is an evil that must be avoided at all costs. Recently, I have been surprised by the refco combi. They are totally silent but we'll see what happens after two years. At the beginning, I propose to use cooling the cooler after turning off the cooling to somehow lower these costs.

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On forums such as, for example, Electrode, we do not call ourselves Pan, Lady, because you never know who is who I can be a woman at the age of 20 ?.

Right , I use forums so rarely that I don't pay attention to such things. For the future, I will certainly know :D

And as for the condensate, I have 4 internal modules, above the door and drainage of condensate along the walls, it rather falls off. Maybe I don't care about appearance, but no exaggeration :lol:

For now, airing is a good option, I do not know if I have it, but you can turn on the fans before sleeping without cooling.