Thinklogical HDX80 Manual - Manual (Page 30)

Revision A December 2011 22
Note: The HDX576 must have ALL four power modules powered ON
within a 5 second time frame.
4. Located directly below the power modules is a fan tray. The fan tray has thumb
screws holding them into the chassis. Verify that the fan tray is secure. Cooling
is accomplished by the fan trays and fans in the power supply units. Air is forced
into the chassis from the fan tray. This cools the vertically mounted I/O cards,
the integrated circuits on the Backplane, as well as removing any heat
generated by the power modules.
Note: When mounting the chassis in a rack, insure that none of the fans
have restricted air flow.
5. The temperature in the chassis is monitored in several locations. The power
supplies have an internal temperature sensor that is monitored constantly for
any conditions that may indicate a problem. Other temperature sensors are
mounted in the fan trays, on the Controller card(s), on the I/O cards, and on
the Backplane.
Note: If any of these sensors detect an over temperature condition, power
will be removed from all sensitive components and the system will shut down.
6. As a further safeguard, all fan speeds are monitored and any fan speed that
does not meet specification will cause the unit to set alarm condition.
Warning! Do not remove the Front Door when the unit is powered. The
Backplane Integrated Circuits will overheat when operating without the Front Door
attached.
Note: All of these conditions send out notifications prior to shut down. For a
detailed list of the alarm descriptions, see Figure 8: Alarm Descriptions and
Drawing on page 15.
7. When the HDX Router has been inspected and found to be in good condition, the
installation process can begin.
Order of Installation Events
Please refer to the Quick Start Guides included with your products for detailed instructions.
The Quick Start Guides are also available in Appendix B.