APC ACRA100 Installation Manual download pdf (Page 22)

Pumped Refrigerant System Operation and Maintenance14

Display Interface

The display interface in the RDU also displays information pertinent to itself and to other system

components. OAs, RAs, and other Cooling Modules are identified as CMs on the display interface

screens.

Item Description Function

 Critical Alarm LED (red) When lit, a critical alarm condition exists and requires

your immediate attention.

 Warning Alarm LED (yellow) When lit, a warning alarm condition exists. Failure to

correct this condition could cause a critical alarm.

 Check Log LED (yellow) When lit, at least one new event has been logged

since the last time the log was checked. Only events

that pertain to the operation of the RDU or cooling

modules in the group will activate the LED.

 Status LED (green) When lit, the RDU is receiving electrical power.

When flashing green, the RDU is downloading

firmware for the controller. This may take several

minutes.

 Liquid Crystal Display (LCD) View alarms, status data, context-sensitive help, and

modify configurable items.

 Up and down arrow keys Select menu items and access information.

 ESC key Return to previous screen or cancel current operation.

 Enter key Open menu items and input changes to cooling group

level and cooling unit level settings.

 Help key Display context-sensitive help. Press the help key for

information about each option on the screen and for

instructions on performing tasks.

ESC

Status

Check

Log

Warning

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APC ACRA100 Installation Manual Page 22