qhy8pro issues - by: Cut

Hi,
I don't know if I'm asking where it's should, but I have problems with an qhy8pro.
I use Kstars and stellarmate and when I want to take long exposure I receive the following error:

2018-10-24T15:13:27: [ERROR] Requested exposure value (120) seconds out of bounds [0.001,86.4].

...seems that I cannot take exposure longer than 86.4 sec...
Another problems is that all subs that I can take are monochrome, but I knew that qhy8pro is an OSC...
Could somebody help me with this issues?
Thanks.
Dulu