AC500 - Abnormal high temperature - fan only on level 2

Hello,
.
yesterday I received an “abnormal temperature error”.
.
Ok, I was not really surprised:
Room temperature ca. 27-28°C, solar input ca. 2000-2400 kw for some hours,
AC output over 4000 Watt for about an hour.
.
But, and that seems strange to me, the FAN was blowing at LEVEL 2.
I remember, that once the FAN was blowing with an even higher LEVEL 3.
.
Why, this time, the AC500 did not increase the fan level but shut down?


To avoid such overheating in similar situations, I am now putting two big ice packs,
carefully wrapped in a plastic bag on the AC500.
.
.
By the way, is there any possibility to read the internal temperature?