User's Manual

Chapter 23 Replacing or upgrading a power supply 297
BCM200/400 4.0 Installation and Maintenance Guide
The BCM400 system starts up when you connect the AC power cord. If the system does not
start and the red Power LED is on, you may need to press the reset button on the base function
tray panel to start the system.
If you are replacing a single faulty power supply module, the BCM400 is already in operation.
The replacement power supply module powers up when fully and correctly inserted in the
redundant power supply cage.
5 Verify the LEDs on the power supply module are lit. Verify all LEDs on the base function tray
indicate the system functions correctly.
Removing a power supply module
Use this procedure for any of the following conditions:
• Remove a single failed power supply module. A power supply module indicates a failure when
the green LED (located on the module) is not lit.
• Remove power supply modules before you install a new power supply cage in the BCM400
main unit (see “Upgrading to a redundant power supply” on page 286).
To remove a power supply module
1 Unfasten the power supply module locking nut. When the nut is fully unfastened, the nut
should move freely in the screw cage.
2 Swing the power supply module handle to a 90 degree angle to the power supply module.
3 Grasp the power supply module handle. With your thumb, compress the locking tab toward
the handle.
4 Pull the power supply module out of the power supply cage (see notes in this step).
• If you are replacing a faulty power supply module, power down the power supply module.
Partially remove the power supply module from the power supply cage. Do not
completely remove the power supply module.
Note: It is not necessary to remove power from the BCM400 main unit or expansion unit
to replace a single power supply module.
Warning: Protect the hardware components against damage from electrostatic discharge.
Always wear a grounded wrist strap before you handle components. Always place the
components in a static-free container.
Warning: When the power is on, wait several seconds before removing the
power supply module completely from the power supply cage to ensure complete
electrical discharge.