Midea Air Conditioner Issues: Communication DF, Heating/Cooling Problems, and Sensor Queries

Hello, I have a Midea air conditioner in my business premises. Replaced half a year ago with a new one. There are problems with him all the time. Recently it keeps throwing df problem. For heating and cooling. The gentleman from the service told me that when it is warm outside, it will not heat up, but I have a cold room in the room and there should also be temperature sensors inside? Is it normal? Please help if someone had a similar problem.

What is this air conditioner? Enter the type and search for a service shop on the net. Midea just offers a lot of service points.

skittlesys wrote:

The gentleman from the service told me that if it is warm outside, it will not be warm,

There may be something to it. Check in the morning. We had 8 oC.
It must start at this temperature.
"df" suggests defrost or defrosting of the outdoor unit.
After switching on, wait at least 20 minutes. for a possible effect. Compressor and JZ fan should start!

Thank you for your answer, it was about 15 degrees outside, but I'm cold inside. Air conditioning is under warranty, but it drives me crazy that still something is not working and even if they fix it, it is the same. The model is the midea of msmabu-12hrdn1. And how is it possible that there is a defrost error at such a warmer temperature? :about

skittlesys wrote:

And how is it possible that there is a defrost error at such a warmer temperature? :about

This is the defrosting of the outdoor unit, which COOLS the air entering it while the air conditioner is heating.
How much time do you wait after switching on the heating mode and what temperature do you set in this mode?
DF or df or the like is not a bug. Errors are Exx, where xx are numbers.

Ok, I understand, now I have it on for 30 minutes and nothing warms up. It is set to a maximum of 30 degrees and maximum winding. It doesn't move at all.

In what mode is it enabled?
Turn off the air conditioner with the remote control.
If you have access to a power outlet or a fuse that supports it, turn off the power for 5 minutes.
Then turn on the power. Wait a minute, watch the display or indicator lights. Remember their indications, possibly a photo.
Then turn on the remote control and set the heating mode and temperature to 30 oC.
Wait 20 minutes and write down what is happening.

It is turned on on the heat, I turned it off with the remote control, then from the socket, after turning it on, nothing appears on the air conditioner and after turning on with the remote control, the temperature is normally displayed, something outside starts and then silence, nothing but 30 degrees is displayed. I've done this several times and nothing. In the morning, the df message appeared in the meantime, then it switched to 30st and that's it. When I put my hand on, nothing blows.
Earlier, I also used the dry option and there was also a df message for a while.
Tomorrow I will try to turn on the cooling, see if it will start.

Check on the fan itself whether it changes gears when you change the fan setting with the remote control.
You have to listen and be patient because gear changes can take a few seconds and the air conditioner is to be confirmed by a beep.

I turned on the heating in the morning and it did not start. I turned on the cooling and it started. So this could be the reason why the field is too warm?

skittlesys wrote:

I turned on the heating in the morning and it did not start.

How much time did you wait for the heating effect?

skittlesys wrote:

after switching on to the socket, nothing appears on the air conditioner and after switching on with the remote control, the temperature is displayed normally, something outside starts and then silence,

You have to check this "something" more carefully and observe it longer from the moment of switching on the heating mode.
Do you have access to the outdoor unit?

I waited 40 minutes for heating and nothing, after switching to cooling, it immediately jumped. This access to the outdoor unit is difficult but I can hear through the door. The fan starts up for a moment just after turning it on while heating and stops and the silence from what I hear. And when cooling, it moves and works all the time.

Well, you can't help yourself.
I don't know how it was bought and installed?
In fact, you should buy it from an installation company that is authorized by the Midea Representation. Then you have a full warranty and in the event of problems with warranty repair, the Midea representative should help in "straightening" the assembly company.
Call and demand that the device be brought into working order.
The outside temperature should not affect the heating effect. In the service I did not find information about such restrictions. The operating temperature ranges should be written in the manual.

I have Midea 3.5kW yesterday, late in the evening, I turned on the heating outside it was 15 * C. She heated without any problem.
In addition, you have the "SUPER" button on the remote control and the Gear should effectively convince the air conditioning to heat.

DF may appear, but only on very cold and humid days, with significant frosts but dry DF practically did not occur.
And check that during heating / cooling, the air conditioner display does not fly you ECO because it limits power consumption but at the expense of efficiency.

If it still does not work right away to the site and let them rummage until they do, the air conditioning is rather idiot resistant, maybe they did not connect some control cable

marcinbbb wrote:

maybe they didn't connect some control cable

Little chance, because it works on cooling, although it is not known how effectively (?).
Communication between individuals is digital, so would be her mistake.

It is a pity that the author of the topic does not have temperature measurements. It would be more correct to give them, because the notions of warm, cold are very subjective.
The worst thing is that in the area of the air intake to the indoor unit, and as a rule it is mounted high, almost under the ceiling, the temperature was close to 30 ° C.
Various control modes are described in the service center, but they are difficult to recommend to an ordinary user. Especially when the device is under warranty.
The only thing that can be done is to check the cooling efficiency by measuring the temperature difference between the air inlet (from the very top of the JW) and the outlet.

Right, the communication is digital, maybe the 4D valve is not working properly.

I did a little test, maybe not with perfect measuring instruments, but they show something.
The climate in the heating mode is set to 27 * C, about 1 minute after turning it on, the air with a temperature of 37 * C comes out of the air conditioning. Outdoor temperature 25 * C

Thank you for the answers, may come tomorrow. I mean especially that they will probably tell me tomorrow that it is too warm in the field and it does not heat it, but I checked in the manual and she should heat when the room is less than 30 degrees and it is certainly less, I'm sitting in a sweatshirt, it's about 18 degrees, even from the ceiling where it hangs is certainly not much warmer. I have to open the door outside to keep warm.

marcinbbb wrote:

The climate in the heating mode is set to 27 * C, about 1 minute after turning it on, the air with a temperature of 37 * C comes out of the air conditioning.

It's impossible that you get this temperature after a minute. The mere change of the operating mode takes much more.
Unless you are counting the time since the JW fan turns on.
But that is not the point.

marcinbbb wrote:

Outdoor temperature 25 * C

External to what?
If it is the temperature around JZ, then we are interested in it, because the service technician's theory of limiting heating to lower temperatures at JZ fails.
I just thought that @skittlesys she trusted the air conditioner installer too much. She should have checked the operation of all modes of operation BEFORE paying.
It is how it is. Need to get a repair.

Unfortunately, the place is not mine, unfortunately the owner is responsible for it.

jack63 wrote:

It's impossible that you get this temperature after a minute. The mere change of the operating mode takes much more.

Should I make a movie for you and prove it? I did not change the mode, it was set to heating and I only turned on the air conditioning + by 2 stitches I increased the temperature to 27 * C

There were gentlemen today, it turned out that the system was unsealed, thank you for the advice, I did not convince myself that it is too warm and that is why it does not heat up and it turned out that something was wrong greetings

skittlesys wrote:

There were gentlemen today, it turned out that the system was unsealed, thank you for the advice, I did not convince myself that it is too warm and that is why it does not heat up and it turned out that something was wrong greetings

Some devices actually do not heat up when it's hot (this is related to the "eco" functions), but this applies to cases when the outside temperature is much higher than the setting inside, then the device "knows better (it is eco after all). ) that you need to open the windows
You did not have it, the setting at 30 * C means that it had to turn on the heating.

Hello, if the DF message is displayed while the air conditioner is operating, all you need to do is wait for the outdoor unit to do the job by itself. If the message does not disappear after about 20 minutes, please report it to the service. Greetings