Sun Microsystems Fire 880, Owner'S Manual

Page: 60 / 236

42 Sun Fire 880 Server Owner’s Guide • August 2001
How to Remove a Power Supply
Caution –
Power supply bays 0 and 1 must always contain power supplies. If a
power supply in either bay fails and the system can continue to operate, you must
leave the failed power supply in its bay until you are able to install a functioning
replacement power supply. A failed power supply in bay 0 or 1 still acts as an air
baffle, channeling airflow to cool the bottom row of disk drives in the disk cage. The
failed power supply should be replaced as soon as possible to regain N+1 power
redundancy.
Before You Begin
It is not necessary to power off the system if you are removing a redundant power
supply. For more information see:
■
“About Power Supplies” on page 73
■
“About Hot-Pluggable and Hot-Swappable Components” on page 144
If your system has only two power supplies, complete this task:
■
“How to Power Off the System” on page 53
What to Do
1. Identify the power supply to be removed.
To locate a faulty supply, check the status LED on the back of each supply. See
“About Power Supply LEDs” on page 163.
2. Release the AC power cord from the releasable tie wrap at the rear of the supply.
Press the tab on the head of the tie wrap to release it.
3. Unplug both ends of the AC power cord.
4. Loosen the two captive Phillips screws securing the power supply to the system
rear panel.
5. Grasp the handle and carefully pull the power supply out of its bay.
Place one hand beneath the supply to support it as you slide it out of the bay.