Emerson Liebert CRV 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 C R 0 2 0 R A 1 C 7 S D 1 8 1 1 E L 1 0 P A - Manual (Page 59)

Liebert iCOM ® Control
51 Liebert ® CRV ™
10.0 L
IEBERT I
COM
®
C
ONTROL
The Liebert CRV is equipped with the most advanced Liebert iCOM control system. The large Liebert
iCOM display is standard on the Liebert CRV.
Each Liebert CRV contains a return air temperature and humidity sensor, supply air temperature
sensor and three remote rack sensors. Up to an additional 7 remote rack sensors can be added to the
sensor network. Each rack sensor takes two temperature readings and reports either the average or
the maximum temperature of the two sensors.
The 2T rack temperature sensors provide feedback to the cooling unit about the condition of the air
entering the server racks. This information allows the Liebert CRV to ensure it is providing just
enough cold air to each rack, virtually eliminating hot spots. Overcooling and excessive airflow are
avoided, greatly reducing unnecessary energy consumption.
Each Liebert CRV includes three 2T rack temperature sensors to monitor three racks. A total of ten
2T temperature sensors can be connected to each cooling unit to monitor every rack a Liebert CRV is
protecting. When multiple cooling units are connected in a Unit-to-Unit iCOM control network, all
sensor data is shared to optimize their performance as a system.
2T rack sensors can also be initially installed on empty racks reserved for future growth with the
control set to ignore these sensor readings. The extra 2T temperature sensor readings can also be
displayed on the local display and reported remotely for monitoring purposes only; not impacting unit
operation. This function provides users with a built-in mini-monitoring system.
Table 22
Keyboard icons and functions
Icon Key Name Function
On/Off Key Controls the operational state of the cooling unit.
Alarm Key Silences an alarm.
Help Key Accesses integrated Help menus.
ESCape Key Returns to the previous display view.
Enter Key Confirms all selections and selects icons or text.
Increase Key
(Up Arrow)
Moves upward in a menu or increases the value of a selected parameter.
Decrease Key
(Down Arrow)
Moves downward in a menu or reduces the value of a selected parameter.
Left and Right
Arrow Keys
Navigates through text and sections of the display.
Upper LED
Blinking Red—Active, unacknowledged alarm exists
Solid Red—Active, acknowledged alarm exists
Lower LED
Amber—Power is available to the unit; unit is NOT operating
Green—Unit is operating with no alarms
?
ESC