IBM TotalStorage 200 Service Manual page 79

Removing a hot swap power supply
Statement 8
CAUTION:
Never remove the cover on a power supply or any part that has the following label
attached.
Hazardous voltage, current, and energy levels are present inside any component that has
this label attached. There are no serviceable parts inside these components. If you
suspect a problem with one of these parts, contact a service technician.
Note: For translations of this safety notice, refer to Safety Information.
Attention: If you remove a power supply while the system is running, when you
do not have power redundancy, your system will abruptly cease to function.
To remove a hot swap power supply
1. Check the LEDs on the power supplies to determine which power supply has
failed. If a power supply has failed, go to step 4 on page 64.
2. Remove the engine covers.
3. Check the LEDs on the diagnostics panel on the system board.
a. If the NON (non-redundant) LED is on, you do not have redundancy: switch
OFF the appliance and peripheral devices; then, continue with step 4 on
page 64.
Note: The Information LED on the operator information panel on the front of
the appliance also will be on. See "Appliance controls and indicators"
on page 1 for the location and contents of the operator information
panel.
b. If the NON LED is not lit, you have redundancy and do not need to switch
off the appliance. Continue with step 4 on page 64.
Chapter 4. Adding and replacing components
63