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Chapter 3
Installing the System
Turning On Housekeeping Power
117
Turning On Housekeeping Power
Use the following procedure to turn on housekeeping power to the system:
Step 1. Verify that the ac voltage at the input source is within specifications for each cabinet being
installed.
Step 2. Ensure that:
• The ac breakers are in the OFF position.
• The cabinet power switch at the front of the cabinet is in the OFF position.
• The ac breakers and cabinet switches on the I/O expansion cabinet (if present) are in the OFF
position.
Step 3. If the complex has an IOX cabinet, power on this cabinet first.
IMPORTANT The 48 V switch on the front panel must be OFF at this time.
Step 4. Turn on the ac breakers on the PDCAs at the back of the each cabinet.
• In a large complex, power on the cabinets in one of the two following orders:
— 9, 8, 1, 0
— 8, 9, 0, 1
• On the front and back panels, the HKP and the Present LEDs illuminate (Figure 3-36).
• On cabinet 0, the HKP and the Present LEDs illuminate, but only the HKP LED illuminates on
cabinet 1 (the right cabinet).