Looks like my unit uses frames C0 and C3 byte positions 28 and 29 as the EEV Low and EEV High. You get a better picture of what the unit is doing with byte position 19, when the unit is active vs idle.
To save some typing Reverse Engineering Senville/Midea SComms - #18 by MidATRIX
I hope this is standard but I don't think it will be since I recently learned that mini-splits typically do not have an indoor EEV. I have both an indoor EEV and a outdoor EXV (This is how my manuals document them and we all know how accurate the manuals are)
I can try and help decode if yours is different.