Power Supplies and Fan Cooling

1. Requirement-The fans in the power/cooling modules (PCMs) provide cooling air only for the two adjacent board slots. Do not install a board in a slot that is not cooled by a PCM.

2. Requirement-You must fill all empty slots (board slots and power supply slots) to avoid loss of cooling air to the active boards. For further information on this subject, see "Filler Panels and Load Boards".

3. Under some circumstances, you may remove a power/cooling module from an active system for a short time. However, if the boards in the adjacent slots create large quantities of heat, it is safer to halt and power off the system first.