Technical Specifications

Liebert iCOM
131
• LOW REFRIGERANT TEMP—Activated when the supply refrigerant temperature sensor
temperature reading drops below the higher of the two calculated dew points, assuming that
neither Sensor A or Sensor B has a sensor failure alarm. This alarm will reset when the
refrigerant temperature sensor reads the refrigerant temperature above both of the two
calculated dew points and the alarm has been acknowledged. This alarm can lock the unit Off. If
this occurs, the main power must be cycled, or the Low Refrig Temp Alarm Code in the Service
Diagnostics menu must be reset to 0.
• LOW TEMP SENSOR A—Activates when the reading from Sensor A drops below the user-
specified alarm setpoint. The alarm will reset when the reading from Sensor A rises 2°F (1.1°C)
above the setpoint and the alarm has been acknowledged.
• LOW TEMP SENSOR B—Activates when the reading from Sensor B drops below the user-
specified alarm setpoint. The alarm will reset when the reading from Sensor B rises 2°F (1.1°C)
above the setpoint and the alarm has been acknowledged.
• NODEX CONDENSATION DETEC—Activated when condensation is detected on a smart
module at CAN node ID X, where X is a value ranging from 81 to 100. This alarm resets when
condensate is no longer detected. The main power must be cycled off to remove the 4°F (2.2°C)
offset value.
• NODEX FAN FAILURE—Activated when a fan failure occurs on a smart module at CAN node
ID X, where X is a value ranging from 81 to 100. The alarm will rest when the fan returns to
normal operation.
• NODEX LOCAL SHUT DOWN—Activated when a smart module at CAN node ID X, where X is
a value ranging from 81 to 100, has been shut down by an external signal. This alarm will reset
when the remote shutdown input is deactivated.
• NODEX RETURNAIR TEMPLIMT—Activated when the return air temperature (entering air
temperature to the module) exceeds the user-specified return air temperature range on a smart
module at CAN node ID X, where X is a value ranging from 81 to 100. This alarm will reset when
the return air temperature return to with the user-specified range.
• NODEX SENSOR FAILURE—Activated when a smart module at CAN node ID X, where X is a
value ranging from 81 to 100, stops receiving a signal from one or more of its supply air, return
air, or refrigerant temperature sensors. This alarm will reset when signals are detected from the
module's sensors.
• NODEX SUPPLYAIR TEMPLIMT—Activated when the supply air temperature (temperature
of the air leaving the module) exceeds the user-specified supply air temperature range on a smart
module at CAN node ID X, where X is a value ranging from 81 to 100. This alarm will reset when
the return air temperature return to with the user-specified range.
• PUMP SHORT CYCLE—Activated when the Liebert XDC is trying to establish flow
(differential pressure) and is unable to do so. The Liebert XDC will attempt three times to
establish flow on a pump before trying the other pump. The control will keep cycling three times
on one pump, then three times on the other pump until it is able to establish flow (differential
pressure). If this cycling occurs for 30 minutes and the Liebert XDC still does not establish flow, a
PUMP SHORT CYCLE alarm will be present. This alarm will shut down the Liebert XDC. To
reset this alarm, the main power must be cycled.
• RAM/BATTERY FAIL—Activated when the RAM backup battery or the RAM itself has failed.
This requires a hardware replacement.
• SENSOR A FAILURE—Activated when the controls no longer senses a signal from Sensor A.
This alarm will reset when the signal is returned and the alarms has been acknowledged.
• SENSOR B FAILURE
— Activated when the controls no longer senses a signal from Sensor B.
This alarm will reset when the signal is returned and the alarm has been acknowledged.
• SMOKE DETECTED—Activated when the Customer Input 1 is configured for “Smoke” and
24VAC is applied to the input. This alarm is reset when the 24VAC is removed.
• SUPPLY REFRIGERANT SENSOR FAILURE—Activated when the control no longer senses
a signal from the supply refrigerant sensor. This alarm will reset when the signal is returned.
NOTE
This is not a room smoke detector and is not intended to replace external smoke detectors.