150 BigIron RX Installation Guide53-1001811-01Replacing cooling system components68. After the power supply is fully inserted, push the power supply front panel toward the back ofthe chassis until the power supply is fully seated.9. For the BigIron RX-32, gently pull the handle on the power supply front panel upward andtoward the top of the power supply front panel. This action locks the power supply in place.10. In the BigIron RX-4, use the screwdriver to secure the two screws on either side of the powersupply front panel.11. Connect the AC power cord or DC power lugs to the power supply front panel.12. Connect the power to its AC or DC source.13. Observe the LEDs on the power supply front panel:• For a DC Supply, the DC IN and DC OUT LEDs should be green which indicates the powersupply is providing power to the chassis components.• For an AC Supply, the AC OK and DC OK LEDs should be green which indicates the powersupply is providing power to the chassis components.• If the ALM LED is On (Amber) then the power supply has failed.For information about troubleshooting this problem, refer to Table 13 on page 81.Replacing cooling system componentsThe BigIron RX Series cooling systems are described in the following sections:• “Replacing fan assemblies in the BigIron RX- 32” on page 150• “Replacing fan assemblies in the BigIron RX-16” on page 153• “Replacing the fan assembly in the BigIron RX-4 and BigIron RX-8” on page 155You can replace a fan or a fan control module while the BigIron RX Series chassis is powered onand running. The fans and fan control modules are located on rear panel of the BigIron RX Serieschassis.CAUTIONIf hot removing or inserting a module, please allow a minimum of 2 seconds after a module (orpower supply or fan tray) has been removed before inserting a module in the same slot.The following sections provide more information about replacing these components.Replacing fan assemblies in the BigIron RX- 32CAUTIONRemoval of rear fan modules allows access to buss bars and backplane. Avoid connect withthese parts. There is hazardous energy level at these locations.The BigIron RX-32 has ten fan assemblies that pull air out. They are accessible from the rear of thechassis. They are numbered as indicated in Figure 77.
