Hello, after testing the “problem” is still there , and an astrofriend with the same setup experience the same behaviour.
Qsi 683 wsg8 with the last qsi drivers/firmware.
Condition
-camera plugged to laptop
-camera is on
-sgp launch
-qsi camera selected on sequence
-setting the qsi camera on quiet mode
-connect the camera
at this point the fan is low
-switch cooler ON
at this point the fan goes full speed and never change this state, even if temp is ok
-switch off the cooler
-disconnect the camera
-in the settings the fan mode is now on full speed by itself
So the workaround of this “problem” is
-first connect the cam
-switch on the cooler
-disconnect the cam without switching of the cooler when sgp ask it
-set quiet mode in cam settings (sequence)
-re-connect the cam
from now and durring all the session, the cam will work in quiet mode.
Quiet mode ?
quiet mode adapt the fan to lowest speed needed to acheive
the temp regulation. If external temp condition changes, the fan will automaticly speed up
to reach the set temperature, and will slow down if possible…
Qiet mode and it’s value -
-it’s quiet 
!!
-better temp regulation
-less vibrations (fans…)
-augmented fan life
any comments ?
By the way i’m really impressed with SGP !! wonderfull work !