Emerson Liebert ICOM-DO User Manual download pdf (Page 68)

Operation

Liebert

iCOM

for Liebert DSE

™

Table 13 Alarms specific to Liebert MC condenser

Event Description

GC 1 or 2 Disconnected

The Liebert iCOM board cannot establish communication with the Liebert MC

Board for 10 seconds consecutively, the “GCx Disconnected” alarm will be

annunciated for the corresponding circuit. No further action is taken by the

Liebert iCOM. Once the Liebert iCOM re-establishes communication with the

Liebert MC board, the event will be reset.

GC 1 or 2 Rem Shutdown

When this alarm occurs, the compressor(s) in that circuit will be turned Off. If

this alarm occurs on the lead circuit, then the lead-lag order of the

compressors/tandem banks will change.

Once the Liebert MC remote shutdown circuit returns to the inactive state

(closed), the event will be reset and the compressors in that circuit may be

turned On again. Normal compressor lead-lag sequence will resume once both

compressors are Off.

GC 1 or 2 Board Fail

Data corruption detected. An unrecoverable fatal system error has occurred

causing a condenser shutdown.

GC Pres Sens Fail C1 or C2 Condenser pressure sensor failure

GC High Cond Press C1 or C2 High condensing pressure

GC Low Cond Press C1 or C2 Low condensing pressure

GC 1 or 2 Amb Sens Fail Ambient temperature sensor failure

GC 1 or 2 Amb Temp Limit High / low ambient temperature

GC Temp Sens Fail C1 or C2 Refrigerant liquid line temperature sensor failure

GC High Cond Temp C1 or C2 High refrigerant liquid line temperature

GC Low Cond Temp C1 or C2 Low refrigerant liquid line temperature

GC 1 or 2 Fan 1

through 4 FAIL

The following errors may result from a fan failure alarm. See specific fan

manufacturer’s literature for troubleshooting information.

VSD high link current

VSD drive error

VSD earth to ground fault

VSD electronics heat sink thermal overload

VSD hall failure

VSD IGBT failure

VSD line fault

VSD motor locked

VSD motor thermal overload

VSD phase failure

VSD-specific uncategorized alarm detected

VSD electronics high-temperature condition

VSD high link voltage

VSD low link voltage

RS-485 communications failure

GC 1 or 2 TVSS Failure TVSS alarm

GC 1 or 2 Comms Error The Liebert iCOM cannot establish communication with GC board.

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Emerson Liebert ICOM-DO User Manual Page 68

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