User guide

Table 1–2 Power Supply LEDs
Power On & OK
(Green)
Module Fault
(Amber)
Status
Off Off No AC power (either PSU)
Off On No AC power (this PSU only)
Off On PSU Fault (over temp, over voltage, over current, PSU fan fail)
On Off AC present, PSU on and OK
On On Fan Fault
Introduction
7
1.4.1.1 Multiple Power Supply Modules
The FC60SS enclosure must always be operated with two Power Supply modules fitted. The two Power
Supply modules operate together so that if one fails the other maintains the power supply and cooling
while you replace the faulty unit.
Module replacement should only take a few minutes to perform but must be completed within 10 minutes
from removal of the failed module.
1.4.2 Cooling Module
The Cooling Module (Figure 1–8) provides system cooling, thermal monitoring and control functions.
System airflow is from front to back of the enclosure:
• Cooling air passes over drives and through the midplane to a central plenum.
• The cooling module pulls air from the plenum and from the RAID modules.
• The PSUs pull cooling air from the plenum at the rear of the enclosure.
Note The system must be operated with low pressure rear exhaust installation (back pressure created by rack
doors and obstacles not to exceed 5 pascals {0.5mm water gauge})