APC ACRA100 Installation Manual download pdf (Page 58)

Pumped Refrigerant System Operation and Maintenance50

Display Operation

The display scrolls automatically through the sensor readings and alarms from the items listed to the

right side of the display screen. To view information from the items listed to the left of the display

screen, press the

ENTER key and use the up or down keys to move through the display.

All CMs have a three digit LED display. The capability of the display is limited to relaying sensor

readings, the identification number of the CM, and alarms by number only.

Alarm levels are indicated by the LEDs. See the display interface on the RDU for alarm descriptions or

for interactive ability.

The RDU comes with an infrared remote control which is used to operate the OAs. The remote has a

menu selection scroll up, scroll down, and enter key.

OAs (only) have a motion sensor to activate the lights.

Cooling Modules are powered on or off from the individual CM, not from the RDU.

Cooling On/Off. press the ENTER key on the display interface. The Status LED will illuminate. The

display interface will read On. Press the Enter key once more to turn cooling to Standby.

Disable On/Off lights. OA only. Press the ENTER key on the display interface. Press the Menu selection

Scroll Down key once. The Lights LED will illuminate. The display interface screen will read On. Press

the Enter key once more to turn the lights Off. The lights on that OA will remain off until the value is set

to On.

Warning LED. A Yellow LED will illuminate when Warning level alarms are initiated.

Critical LED. A Red LED will illuminate when Critical level alarms are initiated.

Note: 60 seconds following access of the features located from the left side of the display

screen (as facing the display) will elapse before the display will revert to scrolling through the

features located to the right of the display screen.

Unit ID. The Unit ID is the identifier given to the CM after it is installed in the system. The RDU uses

the unique number to identify and control the CM.

Supply Air Temp. The supply air temperature sensor reading. Centigrade or Fahrenheit display is

selected at the RDU.

Rack Inlet Air Temp. Rack inlet air temperature sensor reading. Centigrade or Fahrenheit display is

selected at the RDU.

Alarm Code. The Alarm Code number corresponds to the alarm codes listed in “CM alarm messages”

on page 1. Refer to the list to identify the alarm.

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 67 68

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APC ACRA100 Installation Manual Page 58