Operation
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3.8.3 Liebert iCOM-DO
The Liebert iCOM-DO is an optional discrete output relay card that can be connected to the Liebert
iCOM controls that will provide a dry alarm contact for monitoring systems. The Liebert iCOM-DO is
a direct replacement of the Liebert ENV-DO card that was supported on previous Liebert control sys-
tems. The Liebert iCOM-DO allows simultaneous use of the Liebert Intellislot cards as the Liebert
iCOM-DO communicates over the CAN sensor bus network instead of the iGMNet interface.
A single Liebert iCOM-DO card can be connected to Liebert iCOM, which converts up to 15 configu-
rable alarms to a discrete output (relay). The Liebert iCOM-DO setup can be found in the Service, Lie-
bert iCOM-DO menu. The Liebert iCOM-DO is pre-configured and will automatically be identified by
the Liebert iCOM controller. The default alarm configuration matches the original Liebert ENV-DO
card alarm mapping.
Table 9 Alarm mapping
#String Notes
01 Cooling Status The output is set as soon as the unit is providing any cooling.
02 Heating Status The output is set as soon as the unit is providing any heating.
03 Humidifying Status The output is set as soon as the unit is providing any humidification.
04 Dehumidifying Status The output is set as soon as the unit is providing any dehumidification.
05 High Temperature The output is set as long as the high temperature alarm is active.
06 High Humidity The output is set as long as the high humidity alarm is active.
07 Low Temperature The output is set as long as the low temperature alarm is active.
08 Low Humidity The output is set as long as the low humidity alarm is active.
09a High Head Pressure C1 The output is set as long as the compressor 1 high head pressure alarm is active.
09b High Head Pressure C2 The output is set as long as the compressor 2 high head pressure alarm is active.
10 Loss of Airflow The output is set as long as a loss of air flow alarm is active
11 Change Filters The output is set as long as a change filter alarm is active
12 Water Alarm The output is set as long as a water alarm is active
13 Condensing Pump Alarm The output is set as long as the condensing pump alarm is active
14 Glycool Status The output is set when there is free cooling available
15 Unit On The output is set as soon as the unit is turned on
An event is active as long as it is not acknowledged. Once acknowledged, an alarm remains active until the event
situation is not true anymore and the event is reset by the board, which switches off the red LED and the general
alarm relay.
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