Technical Specifications

Monitoring
146
Ext Air Sensor B Under Temperature
(Ext Air Sensor B Temperature) has dropped below (Ext Air Under Temp
Threshold).
Ext Air Under Temp Threshold
Threshold value used in the ([Ext Air Sensor A Under Temperature], [Ext
Air Sensor B Under Temperature]...) events.
Ext Dew Point Over Temp Threshold Threshold value used in the (Ext Dew Point Over Temperature) event.
Ext Dew Point Over Temperature
At least one dew point temperature reading ([Ext Air Sensor A Dew Point
Temp], [Ext Air Sensor B Dew Point Temp]...) has exceeded (Ext Dew
Point Over Temp Threshold).
Fan Issue One or more fans are not operating within their operational parameters.
Hot Gas Solenoid Valve 1 Position Hot gas solenoid Valve 1 position.
Hot Gas Solenoid Valve 2 Position Hot gas solenoid Valve 2 position
Hot Gas Valve 1 Open Position Hot gas Valve 1 open position.
Hot Gas Valve 2 Open Position Hot gas Valve 2 open position.
Maintenance Ramp
The ratio of operations performed to the calculated operations available
between maintenance intervals.
Minimum Room Temperature Set Point
Minimum desired room air temperature. If the room air temperature falls
below this set point, the unit will reduce the cooling.
Pump 1 Loss of Flow
Loss of flow is detected in Pump 1. The loss of flow condition occurs
when no differential pressure is detected across the pump.
Pump 1 State Pump 1 operational state.
Pump 2 Loss of Flow
Loss of flow is detected in Pump 2. The loss of flow condition occurs
when no differential pressure is detected across the pump.
Pump 2 State Pump 2 operational state.
Pump Short Cycle
Pumps have short cycled. A short cycle is defined as turning On and Off
a number of times over a set time period.
Shutdown - Loss Of Power
System lost power. This event becomes active when the unit is powered
on following an unexpected loss of power.
Supply Refrig Over Temp Threshold Threshold value used in the (Supply Refrigerant Over Temp) event.
Supply Refrig Over Temp Threshold Threshold value used in the (Supply Refrigerant Over Temp) event.
Supply Refrigerant Over Temp
Event that is activated when (Supply Refrigerant Temperature) exceeds
(Supply Refrig Over Temp Threshold). The event is deactivated when
the temperature drops below the threshold.
Supply Refrigerant Temp Sensor Issue
The supply refrigeramt temperature sensor is disconnected or the signal
is out of range.
Supply Refrigerant Temperature Supply refrigerant temperature.
Supply Refrigerant Under Temp
(Supply Refrigerant Temperature) has dropped below a specified
threshold.
System Condensation Detected System condensation detected.
System Control Mode System Control Mode
System Date and Time The system date and time
System Event Acknowledge/Reset Reset and/or acknowledge all events.
System On/Off Control Turn system functionality On or Off.
System Operating State Current operating state of the system.
System Status The operating status for the system
Table 55 Liebert XDC/XDP monitoring points (continued)
Data Decription
Definitions