How to change CPU threshold high temperature

Hi,
I have a NETRA 240 server wich should work on high temperature environment (up to 50 deg celsius). After reaching ~48 deg, the system is shuting down.
The HighShutDownThreshold of the CPU is set to 89 deg
The PowerOffThreshold of the CPU is set to 96 deg

Please help me to change these parameters.

Thanks,
Daniel

are you trying to burn down the system? this temperature is out of the range for safe operation!

No, i have 5 more systems which work in this environment without a problem. Please advice if you have an idea how to change the high threshold temperature.