Chapter 4. Operation
Before you begin
Before you power up the enclosure make sure that all the modules are firmly seated in their correct bays.
Power on
Instructions for applying power to the enclosure.
CAUTION:
Do not operate the enclosure system until the ambient temperature is within the specified operating
range. If the drives were recently installed, make sure they have time to adjust to the environmental
conditions.
1. Turn off all PSU power switches.
2. Connect the power cables to the PSU(s).
3. Move all PSU power switches to the on position, as shown in the following figure.
4. The system power LED on the ops panel should be lit green and the disk drive motors should start.
Important: If mains power is lost for any reason, the system restarts automatically when power is
restored.
Note: For details of the ops panel LEDs and related fault conditions, see "Ops Panel LEDs."
Care should be taken when turning on/off PSUs. The following points should be considered when
turning PSUs on/off.
v Remove the AC cord before inserting or removing a PSU.
v Turn off the PSU switch before inserting or removing the AC cord.
v Allow 15 seconds between turning the PSU off and back on again.
v Allow 15 seconds between turning one PSU in the system on and the other PSU off.
v Never turn off a PSU whilst any amber LED is lit on the partner PSU.
Figure 18. PSU Power Switch and LEDs
© Copyright IBM Corp. 2017 25
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