Vertiv Liebert iCOM DP400/500 Installer/User Manual page 57

Table 4.3 Events Specific to Liebert MC Condenser
Event
CAN GC 1 or 2
GC 1 or 2 Rem
Shutdown
GC 1 or 2 Board Fail
GC Pres Sens Fail C1
or C2
GC High Cond Press
C1 or C2
GC Low Cond Press C1
or C2
GC 1 or 2 Amb Sens
Fail
GC 1 or 2 Amb Temp
Limit
GC Temp Sens Fail C1
or C2
GC High Cond Temp
C1 or C2
4 Managing Events: Alarms, Warnings and Messages
Description
• The Liebert® iCOM board cannot establish communication with the Liebert® MC condenser board for 10 seconds
consecutively.
• Alarm notification displayed for the corresponding circuit.
• EconoPhase pump operation disabled for the circuit affected.
• When iCOM re-establishes communication with the Liebert® MC board, the event is reset.
• Remote shutdown requested.
• Compressor(s) and EconoPhase pump(s) in the corresponding circuit are powered-off.
• If event occurs on the lead circuit, then the lead-lag order of the compressors/tandem banks changes.
• When the Liebert® MC condenser remote-shutdown circuit returns to inactive state (closed), the event is reset
and the compressors in that circuit may be powered-on.
• Normal compressor lead-lag sequence resumes when both compressors are Off.
An unrecoverable failure of the Liebert® MC condenser control board has occurred causing a condenser shutdown.
Condenser pressure sensor failure
High condensing pressure
Low condensing pressure
Ambient-temperature sensor failure
High/low ambient temperature
Refrigerant-liquid-line temperature-sensor failure
High refrigerant liquid line temperature
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