Split air conditioning - DIY assembly Stay away from DIMSTAL and SYMANDO

Hello this is my first recession ever.
I am writing you because I have desperately sought help and only awards since 2008 as allowed in forums only by refrigeration engineers, evacuated with vacuum pump and coolant is not in the environment, etc. have found.
If yes, in principle, everything right but if I buy an air conditioner for 500 I will give no refrigeration engineer for 250 for 20min work. If I find any one.

In this (and similar) Air conditioning refrigerant is already in outer part.
Man has only the inner and outer parts mounted on the wall and connect the cables / pipes together.
The electrical cable on the inner part is a little fumbling. The connections are front under the hood, but you have to fumble through the cable from the rear forward, since all connections go back through the wall.

Now the main question: how does that fill the pipes without expert.
Answer: the same way as of Sportster 41 described in the comments of its recession.

Problem 1: It comes out a little coolant during bleeding.
Not good for the environment. But when I think how much coolant leak in a car accident,
everyone must decide for themselves.

Problem 2: actually you would have to evacuate the pipes; ie with a vacuum pump the air + moisture raussaugen.
Without this process air conditioning has probably less effective.
I hope but no longer need the air conditioning as 20Tage a year, I take that into account.
everyone must decide for themselves.

Problem 3: length of copper pipes.
there is also a long finished pipes (with connections) to buy.
The air conditioning coped according to instruction a tube length of 15m.
Whether because the existing coolant enough? maybe check with the seller.
There are similar systems in hardware stores with 5m pipelines.

Volume:
the inner part of course you can hear the airflow.
but is not an unpleasant sound, I can sleep well here.
I would describe it as quiet. In the living room even as very quiet. Even the outdoor unit is quiet at normal load. (When I think of my mobile air conditioner that was vieeel louder than the outdoor unit)

Conclusion:
I would buy air conditioners of this type at any time, and install itself, filling, etc.
For 500 you get a whole lot of equipment. It's all there, even the wall mount for the outdoor unit, plugs, screws, remote + support + batteries.
Of course you can also see where the low price comes from: plastic appearance.
The next price category, it's not going at 1500.
everyone must decide for themselves.

When it gets really hot, I try to cool the air conditioner 3 rooms.
If that did not work I'll buy another one for the living room

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Addendum:
after about 30 hours no more cooling.
Probably the coolant is entwiche, although I have done everything according to regulations (evakumieren up on there.
No help from SIMANDO.
Try it now on DIMSTAL. Will report me again.

If I re-buy an air conditioner, then one from the hardware store with QUICK connections, then I have at least one contact.

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Addendum: by Dimstal no response ==> Stay away from SYMANDO and DIMSTAL