Appendix B: Alarm Table
Alarm
Description
High Return Temp
The temperature of the return air is higher than the set value
Low Supply Temp
The temperature of the supply air is lower than the set value
High Supply Temp
The temperature of the supply air is higher than the set value
High Return Humidity
The humidity of the return air is higher than the set value
Low Return Humidity
The humidity of the return air is lower than the set value
Water Leakage
The condensate water is leaking from the drain pan onto the room floor
High Condensate Water
The condensate water in the drain pan reaches the highest level
Filter Clogged
The filter is clogged
Filter Maintenance
The filter has not been maintained in the specified time period
Airflow Loss
All fans cannot work normally
Remote Shutdown
The unit has been shut down remotely
Primary Unit Loss
The primary unit cannot communicate with secondary units
Secondary Unit Loss
The secondary unit cannot communicate with the primary unit
Return Temp Sensor 1 Failure, Return Temp Sensor 2 Failure, Return Temp
Sensor 3 Failure
The temperature of the return air is out of the detection range of the
return temperature sensor
Return Humidity Sensor 1 Failure
The humidity of the return air is out of the detection range of the return
humidity sensor
Supply Temp Sensor 1 Failure, Supply Temp Sensor 2 Failure, Supply Temp
Sensor 3 Failure
The temperature of the supply air is out of the detection range of the
supply temperature sensor
Remote Temp Sensor 1 Failure, Remote Temp Sensor 2 Failure, Remote Temp
Sensor 3 Failure, Remote Temp Sensor 4 Failure, Remote Temp Sensor 5
Failure, Remote Temp Sensor 6 Failure, Remote Temp Sensor 7 Failure,
Remote Temp Sensor 8 Failure, Remote Temp Sensor 9 Failure, Remote Temp
Sensor 10 Failure
The air temperature is out of the detection range of the remote
temperature sensor
Heater Failure
The heater cannot work normally
Humidifier Failure
The humidifier cannot work normally
Unit Address Duplicated
The address of one unit is the same with the address of another unit
Low Return Temp
The temperature of the return air is lower than the set value
High Remote Temp
The ambient temperature detected by the remote temperature sensor is
higher than the set value
Low Remote Temp
The ambient temperature detected by the remote temperature sensor is
lower than the set value
10DI Communication Failure
The 10DI board cannot communicate with the iCOM Edge board
Fan 1 Failure, Fan 2 Failure, Fan 3 Failure, Fan 4 Failure, Fan 6 Failure, Fan 8
Failure, Fan 9 Failure, Fan 10 Failure
The fan cannot work normally
Custom 1
This alarm can be set as Smoke Sensor Alarm or Fire Sensor Alarm. Or it
can be customized
Fire Sensor Alarm
Fire is detected
10 Appendices
71
Vertiv™ Liebert® CRV CRC30 and CRC60 Chilled Water Cooling System User Manual
