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 70)

Liebert iCOM ® Control
Liebert ® CRV ™ 62
The supply temperature Setpoint may require adjusting since it will be dependent on the distance of
the CRV to the server racks being cooled. This temperature will also be dependant on rack blanking
panels, server population and if containment is being used .
Table 25 shows the flexibility of the Liebert CRV and how the different sensor configurations can be
used to control the Liebert CRV fan speed and cooling capacity. The table shows the different coupled
and decoupled modes available for the Liebert CRV.
10.4 Event Log
The event log displays all events and actions that have been generated by the unit. When multiple
units are networked you will see the event log of the whole system. Each event shows the unit that
generated the alarm, time and date stamp, a description and the event type.
10.5 Spare Part List
The spare parts lists contains a detailed description and part number that can be used to order parts
for the unit. These part numbers are specific to each model and option installed on the unit.
10.6 Wellness—Next Maintenance Calculation
The next maintenance calculation, as well as the included diagnostics feature, will help keep the
cooling unit running at peak performance to ensure minimum component stress and maximum
reliability. The diagnostics will help the service engineer evaluate the unit’s operation since the last
maintenance.
10.6.1 Calculation of Next Maintenance and Diagnostics
If the unit includes any of the following components, they are included in the calculation:
• Fan(s)
• Compressor 1
• Compressor 2
• Electric Heaters
• Humidifier
For each component, the next maintenance will be calculated from the following parameters:
• Standard service interval (1, 2 or 4 times a year) (to be set)
• Working hours (counted)
• Number of starts (counted)
• Average running time (calculated)
• Optimum number of starts per hour (to be set)
• Maximum number of starts per hour (to be set)
• Maximum bonus to enlarge time to next maintenance (to be set)
• Maximum penalty to reduce time to next maintenance (to be set)
Table 25 Controlling sensor settings
Cooling Control
S103Cool / S125 Fan Supply Remote Sensor Return
Fan Control
Supply
Factory Default
(Coupled)
N/A N/A
Remote Sensor
Recommended
(Decoupled)
X
(Coupled)
N/A
Return
X
(Decoupled)
X
(Decoupled)
X
(Coupled)