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Operation with Advanced Microprocessor with Graphics Control
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3.0 OPERATION WITH ADVANCED MICROPROCESSOR WITH GRAPHICS CONTROL
The advanced microprocessor with graphics (G) control for your Liebert Challenger 3000 unit features
an easy to use, menu driven LCD Graphics Display. The menus, control features, and circuit board
details are described in this section. For more details on the control refer to 4.0 - System Perfor-
mance with Advanced Microprocessor Controls; for details on the alarms refer to 5.0 - Alarm
Descriptions.
3.1 Basics
Control keys include ON/OFF, Menu/ESCape, ENTER, Increase (UP) arrow, and Decrease (DOWN)
arrow. Refer to Figure 3. These keys are used to move through the menus as prompted on the LCD
display (refer to Figure 4).
To turn the unit ON, press the ON/OFF key after power is applied. To turn the unit OFF, press the
ON/OFF key before power is disconnected.
Active alarms are indicated on the LCD screen by a ringing bell. Alarms are also annunciated by an
audible beeper. To silence an alarm, press the ENTER key as prompted on the display. The unit
stores the 60 most recent alarms for review.
Setpoints, DIP switch settings, and other selections were made on your unit before testing at the fac-
tory and are kept in nonvolatile memory. Setpoints were chosen based on typical operating experi-
ence. Other selections were made based on options included with your unit. Make adjustments to the
factory default selections ONLY if they do not meet your specifications. When entering setpoints, time
delays, etc., the allowable ranges are displayed and may require a password, if enabled.
Figure 3 Advanced microprocessor with graphics (G) control panel