Later got ppl come check.. Hopefully can be fix..
Got the answer from the service team. My midea is under power. 21k btu is not enough to power on 3 9k btu fancoil. That why not cold and noisy. They tell me that there is nothing to be done. The SA told me that turn on 2 aircon first after then turn on the last aircon so all will be cold but it didnt worked at all. Buy cheap aircon end up waste more. Now my aircon cannot be change. Some more the service guy also telling me that starmex nowadays also facing similar problem, so buy cheap or ex still the same. So mit /midea support here or mit / midea promoter or mit /midea SA stop confusing buyer.
Sure or not?
Mit Starmex got 3 type compressor?
2E20VA for 2 FCU
3A28VA for 3 FCU now I've using it, so far never facing got underpower an issue.
4A28VA suitable for 4 room HDB flat.
4A38VA if 5 room type HDB flat recommended.
But I dunno how you guy, when for new purchase.
That is why have to do more research user feedback 1st.
Something that brand selling much cheaper was the issue at behind.
I Guess would be MHI.
Got it problem, call underpower. Lol
Research still the same all here is mit starmax supporter or i will said seller.. Lols so call expert.
To be honest if you were never used others brand b4 and after jump over to mit starmex, guaranty i am same as you now.
The quietest and comfort on mit starmex inverter, so far no others brand can be do the same.
Went to GC and got confused.
My original plan was to replace the aircon blower and compressor and leave the piping.
SA told me that I need to follow the existing aircon configuration.
For Eg. I wanted system 4. But if the existing system is system 2 X 2, I need to follow it back to system 2 X 2 and cannot anyhow switch to system 4.
Also, I need to follow the same power of the blower.
Eg. If bedroom existing blower was 9k, I cannot change it to a 12k blower. Because it will still have the 9k output as the piping/power is only configured to 9k?
I downgrade from System 3 to System 2 also can and my living room changed to 13K BTU also pipeline same as the 10K BTU one.
So I think should not be an issue.