Mitsubishi Electric CM33-TL User Manual page 39

CPU Fan Protection
The CPU Fan Protection function, when enabled, has the capability of monitor-
ing the CPU fan during system boot-up and will automatically power-off the
system once it has detected that the CPU fan did not rotate. Set this field to
disabled if you are not using this function. Refer to "CPU Fan Connector with
CPU Fan Protection Function" in chapter 2 for more information.
CPU Temp. Prot. Function and CPU Temp. Prot. Alarm
The CPU Temperature Protection function has the capability of monitoring the
CPU's temperature during system boot-up. To use this function, set the "CPU
Temp. Prot. Function" field to Enabled, then select the desired CPU tempera-
ture limit in the "CPU Temp. Prot. Alarm" field. Once the system has detected
that the CPU's temperature exceeded the limit, 5 warning beeps will sound
and at the same time, a warning message will appear on the boot-up screen
instructing you to press <Del> in order to enter the man menu of the BIOS. If
you did not press <Del>, the system will automatically power-off after the 5
warning beeps. You may either:
MAN-0CM33-001
1. Press <Del> then enter a new CPU temperature limit;
or
2. Allow the system to power-off after the 5 warning beeps then check
whether the heatsink and fan are mounted properly onto the CPU
because high CPU temperature may be due to incorrect fan/heatsink
installation. Now restart the system. If the same problem persists, it
may be that the CPU fan is damaged or it is not rotating properly. Try
replacing it with a new fan. If it is due to other contributing factors that
resulted in high CPU temperature, you may need to set a lower CPU
temperature limit.
CPU Temperature References
When you power-up a system, the BIOS message appears on the
screen and the memory count begins. After the memory test, the
CPU temperature range is normally between 32° C and 35° C. When
you run an operating system then tried to reboot the system, the CPU
temperature range at this time is between 40° C and 45° C. These
temperature references serve as a guide when you select the CPU
temperature limit.
MC Series Computer Products
3 AWARD BIOS SETUP UTILITY
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