Emerson Liebert CRV User Manual page 166

Table 37 Liebert CRV
Data Label
Air Temperature Control Sensor
Air Temperature Dead Band
Air Temperature Set Point
Auto Restart Delay
BMS Communications Timeout
BMS Timeout Period
Bottom Fan Issue
Calculated Next Maintenance Month
Calculated Next Maintenance Year
Chilled Water Control Valve Failure
Clogged Air Filter
Compressor 1 High Head Pressure
Compressor 1 High Pressure Transducer
Issue
Compressor 1 Hours Exceeded
Compressor 1 Low Pressure Transducer
Issue
Compressor 1 Low Suction Pressure
Compressor 1 Pump Down Issue
Compressor 1 Short Cycle
Condenser 1 Issue
Condenser Circuit Unspecified General Event
Condenser Control Board Issue
Condenser Fan Issue
Condenser Low Noise Mode - Full Days
Condenser Low Noise Mode - Interval Days
Condenser Low Noise Mode Max Fan Speed
Condenser Low Noise Mode Schedule
Control
Condenser Low Noise Mode Start Time
Condenser Low Noise Mode State
Condenser Low Noise Mode Stop Time
Condenser Max Fan Speed Override
Condenser Normal Mode Max Fan Speed
Condenser Outside Air Temp Out of
Operating Range
Condenser Outside Air Temp Sensor Issue
® ™
Liebert CRV
™
- Glossary
Controller Liebert iCOM
Data Description
Sensor from which air temperature measurements will be used for cooling
and heating control.
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.
Desired air temperature. This set point is dependent upon which sensor is
selected for control.
If power is lost, the control will delay this amount of time after power is
restored before restarting the unit.
Building Management System (or external monitoring system) has not
communicated with the system within the expected timeframe.
Timeframe within which the Building Management System (or external
monitoring system) must communicate with the system to avoid a timeout.
The bottom fan is not operating within its normal parameters.
Calculated month of the next scheduled maintenance. Used in conjunction
with [Calculated Next Maintenance Year].
Calculated year of the next scheduled maintenance. Used in conjunction
with [Calculated Next Maintenance Month].
Chilled water valve out of position. Chilled water control valve position does
not match expected value.
Air filter is dirty and needs to be (cleaned or) replaced.
Compressor 1 high head pressure
Compressor 1 high pressure transducer is disconnected or the signal is out
of range.
Operating hours for compressor 1 have exceeded the threshold.
Compressor 1 low pressure transducer is disconnected or the signal is out
of range.
Compressor 1 low suction pressure.
Unable to pump down suction-side pressure during compressor 1
shutdown.
Compressor 1 short cycle. A short cycle is defined as turning on and off a
number of times over a set time period.
Condenser 1 is not operating within its normal parameters.
One or more unspecified condenser circuit events active. See local unit
display for further details.
The condenser control board is reporting an issue.
Condenser fan is not operating within its operational parameters.
Days of the week selected for low noise mode full day scheduling.
Days of the week selected for low noise mode interval scheduling.
Maximum fan speed when condenser is placed in low noise mode.
Enable/disable scheduled control of condenser low noise mode.
The time of day at which the condenser will transition into low noise mode.
State of condenser low noise mode scheduler control.
The time of day at which the condenser will transition out of low noise
mode.
Fan speed exceeding the maximum set point in order to alleviate a high
temperature or pressure condition.
Maximum fan speed when condenser is not in low noise mode.
[Condenser Outside Air Temperature] is either above an upper threshold or
below a lower threshold.
Condenser outside air temperature sensor is disconnected or the signal is
out of range.
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Operation