Cooling Budget; Ipmc Circuitry; Air Filter Maintenance; Table 4-2 Cooling Budget - Emerson AXP1620 Installation And Use Manual

Cooling Budget

4.6.2
4.6.3
4.7
AXP1620 Installation and Use (6806800E23E)
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Cooling Budget
The shelf cooling is designed to operate with the following temperature rises across the shelf.
This allows cards with these dissipations to operate with commercial grade components, 70°C
ambient temperature typical.

Table 4-2 Cooling Budget

Ambient Temperature
25°C
40°C
55°C
The following guidelines can assist in determining the cause of the cooling failure. Also refer to
Environmental Requirements on page 63
temperature requirements during servicing.
If a cooling failure occurs, the failure may be caused by a failed fan or possibly a clogged
filter. Check the filter first before replacing the FTM (see
For further information of nonrecoverable temperature events, refer to the FRU Information
chapter in the AXP1620 Subsystem IPMI Programmer's Reference.

IPMC Circuitry

Preprogrammed FRU and SDR information reside on the FTMs and is accessible from the SAM
2
through the I C bus. FRU information can be found in the AXP1620 Subsystem IPMI
Programmer's Reference, listed in

Air Filter Maintenance

Air filters should be cleaned every 90 days or sooner, depending on the conditions of the Central
Office Environment. Because Central Offices vary in physical location and cleanliness, check
your air filters every week after you first install your system. In a dusty environment, a filter may
need cleaning more often than a filter in a cleaner environment. Check the filters frequently until
you have a good idea of how often it needs cleaning. Based on your findings, establish a regular
cleaning schedule and keep a log to record the date of each filter cleaning or replacement.
Air filters should also be checked occasionally to make sure they are not obstructed or
damaged. Visually inspect filters for tears or rips. Do not reinstall a torn filter as it will be
ineffective in trapping particulates and will interrupt air flow distribution. To maintain safety
certification, use only Emerson approved fan filters. You can order replacement fan filters (part
number RAF1620) by contacting your Emerson sales representative.
For replacement procedures, refer to
Temperature Rise
Delta T = 20° C
Delta T = 15° C
Delta T = 10° C
for important information regarding ambient
Air Filter Maintenance on page
Appendix A, Related Documentation.
Replacing the Fan Filter on page
AXP1620 Operations
75).
116.
75