Emerson MODBUS IP Manuel D’Utilisation

™

™

™

™

™

™

™

Liebert iCOM

®

 v4

Actual Air Temperature Set Point

The actual set point being used for air temperature control.  This value may differ from 

[Air Temperature Set Point] if compensation is applied by the control.

Actual Humidity Set Point

The actual set point being used for humidity control. This value may differ from 

[Humidity Set Point] if compensation is applied by the control.

Adjusted Humidity

Humidity value being used for control. This value may differ from the actual measured 

[Return Humidity] based on several factors which may include, but are not limited to, 

selection of humidity control sensor and humidity control type.

Air Economizer Availability

Indicates if the outside air conditions are appropriate for cooling with the air 

economizer or glycol freecooling.

Air Economizer Control Source

Source of control of the air economizer.

Air Economizer Emergency 

Override

Indoor room temperature has exceeded its upper threshold and the outdoor air 

damper has been opened for emergency cooling.

Air Economizer Reduced Airflow

Air economizer filter is dirty and needs to be cleaned or replaced.

Air Temperature Control 

Integration Time

Time value used when system is under integral air temperature control.

Air Temperature Control Sensor

Sensor from which air temperature measurements will be used for cooling and heating 

control.

Air Temperature Control Type

Type of algorithm used to control the system's output air temperature.

Air Temperature Dead Band

Value that is divided evenly to form a temperature range above and below [Air 

Temperature Set Point]. If measured air temperature is within this range, no heating or 

cooling will occur.

Air Temperature Proportional Band

Value that is divided evenly to form proportional temperature control bands above and 

below [Air Temperature Set Point].

Air Temperature Set Point

Desired air temperature.  This set point is dependent upon which sensor is selected 

for control.

Airflow Sensor Issue

Airflow sensor is disconnected or the signal is out of range.

Ambient Air Sensor Issue

Ambient air sensor is disconnected or the signal is out of range.

Analog Input Reading

Generic analog input reading (unitless).

Auto Restart Delay

If power is lost, the control will delay this amount of time after power is restored before 

restarting the unit.

BMS Communications Timeout

Building Management System (or external monitoring system) has not communicated 

with the system within the expected timeframe.

BMS Timeout Period

Timeframe within which the Building Management System (or external monitoring 

system) must communicate with the system to avoid a timeout.

Calculated Next Maintenance 

Month

Calculated month of the next scheduled maintenance. Used in conjunction with 

[Calculated Next Maintenance Year].

Calculated Next Maintenance Year

Calculated year of the next scheduled maintenance. Used in conjunction with 

[Calculated Next Maintenance Month].

Chilled Water Control Valve Failure

Chilled water valve out of position. Chilled water control valve position does not match 

expected value.

Chilled Water Valve Hours

Operating hours for chilled water valve since last reset of this value.  If operating hours 

exceeds 32,000, this client will continue to display 32,000, but the iCOM display will 

show the actual value.

Circuit Cooling Load

The amount of heat energy currently being removed by a single refrigeration circuit.

Clogged Air Filter - Event Control

Enable/disable the activation of the [Clogged Air Filter] event. If set to 'disabled', the 

event will not be annunciated. This implies that the event will not be placed in any 

active event list or in any event history list.

Clogged Air Filter - Event Type

The event type for the [Clogged Air Filter] event.

Clogged Air Filter

Air filter is dirty and needs to be (cleaned or) replaced.