Vertiv Liebert XD Series, System Design Manual

Page: 159 / 200

•
HIGH REFRIGERANT TEMP
—Activated when the refrigerant temperature sensor reads the
refrigerant temperature above the user-specified alarm setpoint. This alarm will reset when the
reading from the refrigerant temperature sensor drops 2°F (1.1°C) below the user-specified
setpoint and the alarm has been acknowledged.
•
HIGH TEMP SENSOR A
—Activated when the reading from Sensor A is above the user-
specified alarm setpoint. The alarm will reset when the reading from Sensor A drops 2°F (1.1°C)
below the setpoint and the alarm has been acknowledged.
•
HIGH TEMP SENSOR B
—Activated when the reading from Sensor B is above the user-
specified alarm setpoint. The alarm will reset when the reading from Sensor B drops 2°F (1.1°C)
below the setpoint and the alarm has been acknowledged.
•
LOSS OF FLOW PUMP 1
—Activated when Pump 1 is commanded to run and the differential
pressure switch does not sense differential pressure (set at 6 psi; 41kPa; 0.41 bars). After
attempting to start Pump 1 three times, the Liebert XDC will automatically switch to the other
pump to establish flow. This alarm will reset when flow has been established on Pump 1 and the
alarm has been acknowledged.
•
LOSS OF FLOW PUMP 2
—Activated when Pump 2 is commanded to run and the differential
pressure switch does not sense differential pressure (set at 6 psi; 41kPa; 0.41 bars). After
attempting to start Pump 2 three times, the Liebert XDC will automatically switch to the other
pump to establish flow. This alarm will reset when flow has been established on Pump 2 and the
alarm has been acknowledged.
•
LOW MEMORY
—Activated when the control board is low in memory resources. This alarm
rests automatically as soon as memory consumption falls below the threshold.
•
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.
Vertiv | Liebert® Xtreme Density™ System Design Manual | 159