Chapter 4. Error Analysis and Fault Isolation
EK–SMCPP–UG. A01
4–15
4.3.5 User-Initiated Expansion Enclosure Shut Down
When you press and hold the PVA dc power switch for at least 5 seconds on the
expansion enclosure and the expansion EMU can communicate with the master
EMU, one of the following power shut down operations occur:
NOTE
When the expansion unit
cannot communicate
with the master EMU, pressing the dc power
switch causes an immediate controlled power shut
down of just the expansion enclosure.
1. The slave EMU changes its status to indicate that the dc power switch was
pressed.
2. The master EMU notes the change in status.
NOTE
When the master EMU is not communicating with
the controller or the controller does not support a
controlled power shut down, the master EMU
commands all enclosures to perform an
immediate power shut down.
3. The master EMU notifies the controller of the change in status.
4. When the controller is ready, it sends a controlled power shut down command
to the master EMU.
5. A controlled power shut down is completed on all subsystem cabinets.
After correcting the problem that required the controlled power shut down you
can restore power by momentarily pressing the Alarm Control switch on each
EMU.
