Mitsubishi Mr.Slim heat pump

[desA]

I am trying to find proof that making it work at a few degrees lower wont damage the outdoor unit.
Cause usually when it comes to degree control precision is not that precise, i don't think they would make it shut off at it's exact crucial point, they have to give a margin of error.

I'll give you the way to know for certain:

1. Open the outdoor unit - gain access to the compressor;
2. Install a temp sensor 150mm from the compressor exit, on the discharge line (the hot one);
3. Let the unit pull down & watch the discharge temp;
4. If temp exceeds 107-110'C, then you are pushing your unit too far.

It is possible that the manufacturer lets the compressor discharge run up a little higher on non-continuous load, but not too much higher.

Let us know how you get on.