Meaning: the temperature reading of one of the thermometers in the Chassis has reached or exceeded the 'shutdown' temperature level. The DDR will be shutdown to prevent damage to the system. The index value of the alarm indicates the thermometer index that may be looked up in the environmentals table 'temperatures' for more information about the actual thermometer reading the high value. What to do: Once the system has been brought back up, after checking for high environment temperatures or other factors which may increase the system temperature, check other environmental values, such as Fan Status, Disk Temperatures, etc...