Supermicro SuperServer 1028GR-TR - Overheating; Overheat Temperature Setting; Responses

Chapter 3: System Interface
3-3
12
NIC
Power: Indicates power is being supplied to the system power supply units. This
LED should normally be illuminated when the system is operating.
HDD
Overheating
There are several possible responses if the system overheats.
Overheat Temperature Setting
Some backplanes allow the overheat temperature to be set at 45, 50, or 55 by
changing a jumper setting. For more information, consult the backplane user manual
at www.supermicro.com. (Click Support, then the Manuals link.)
Responses
If the server overheats:
1. Use the LEDs to determine the nature of the overheating condition.
2. 
3. Check the routing of the cables and make sure all fans are present and operating
normally.
4. Verify that the heatsinks are installed properly.