Fan speed
The cooling module fan speed increases as the temperature reading of the sensors increases. The
cooling module fan speed decreases as the temperature reading of the sensors decreases.
System temperature information
Each of the zones correspond to temperature sensors on the modules. For instance, the I/O module
has five temperature zones. Zones 1, 2, and 3 are inlet air sensors and 4 and 5 are outlet air
sensors. The SF module has two temperature sensors and the CP module has four temperature
sensors. The alarm threshold is the temperature the zone can reach before the device moves from
normal to alarm mode. If the module exceeds the shutdown threshold by one degree it causes the
module to shut down.
The zone alarm is triggered after one of the following events occurs:
• A module alarm is triggered.
• Module alarms are cleared.
Heat sensor locations for first generation and second generation I/O modules
The following figure shows the baseboard component of a first generation I/O module on the left and
the PIM component of a first generation I/O module on the right.
Figure 2: Heat sensor locations in a first generation I/O module
The following figure shows the baseboard component of a second generation I/O module on the left
and the PIM component of a second generation I/O module on the right.
Cooling module fundamentals
16
Installing Cooling Modules in Avaya VSP 9000
March 2015