Liebert AC4 User Manual

When more than one device is in Standby mode or turned On, the Liebert AC4 performs the operations in
a sequence that rotates the order. For example, in a sequence set up to occur every two days:
• Monday: Device 1 is placed on Standby, and Devices 2, 3 and 4 operate.
• Wednesday: Device 2 is placed on Standby, and Devices 1, 3 and 4 operate.
• Friday: Device 3 is placed on Standby, and Devices 1, 2 and 4 operate.
• Sunday: Device 4 is placed on Standby, and Devices 1, 2 and 3 operate.
NOTE: The Liebert AC4 will not cycle outputs that have been manually forced On or Off through the
Override Output Menu or the hardware switch (see Override Output on page64).
To change the auto sequencing settings:
1. From the Setup System Operation Menu, use the arrows to choose Auto Sequencing, then
press Enter.
2. In the Activate / Deactivate screen, use the arrows to choose one
of three options:
a. ON for intervals of every 1 to 99 days, then press Enter and
proceed to Step 3.
b. 12h for an interval of every 12hours, then press Enter and
proceed to Step 4.
c. OFF to deactivate auto sequencing, then press Enter to
return to the previous menu.
3. Select the interval for how often the sequencing should occur in
the Every03 Daysfield. The default is 3 days; valid entries range
from 0 to 99 days.
• For each digit, use the arrows to choose a number from 0 to
9, then press Enter to advance to the next digit.
• When finished, press Enter to set the time of day.
4. Specify the time of day the sequencing should begin in the
At00:00 field. The format is HH:MM for hours and minutes.
• Use the arrows to choose from available entries for hours
(00-23), then press Enter to advance to minutes.
• Use the arrows to select minutes (00-59).
• When finished, press Enter again.
7.8.2 Turn Standby Testing On or Off
Standby testing permits scheduling an automatic operational check of
devices in Standby mode.
When this feature is activated (ON), the Liebert AC4 tests all devices in Standby mode by putting each
device in operating mode for a designated time. You may specify the time of day the testing begins, the
duration of the test and the interval between tests. Standby testing is OFF (deactivated) by default.
To change the standby testing settings:
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Liebert AC4 Specifications

General

Brand	Liebert
Model	AC4
Category	Control Unit
Language	English