Technical Specifications

Liebert iCOM
135
SUPPLY CW SENSOR FAILURE—Activated when the control no longer senses a signal from the
Supply CW sensor. This alarm will reset when the signal is returned.
SUPPLY REFRIGERANT SENSOR FAILURE—Activated when the control no longer senses a
signal from the supply refrigerant sensor. This alarm will reset when the signal is returned.
UNIT CODE MISSING—Activated when a valid unit code has not been entered and saved. To reset,
enter valid unit code, save and execute.
WATER UNDER FLOOR—Activated when Customer Input 1 is configured for “Water Alarm” and
24VAC is applied to the input. This alarm is reset when the 24VAC is removed.
7.7 Liebert XDP Warnings
LOSS OF POWER—Activated when the unit is On and operational and 24VAC power to the control
is lost. This alarm will be emitted when power is restored to the control. The Liebert XDP will restart
at a user-defined time delay after power is restored. Once activated, the alarm will remain activated
for 30 minutes.
PUMP 1 HRS EXCEED—Activated when the Pump 1 Actual Hours exceeds the user-specified limit.
To reset, Actual Hours must be reset to 0.
PUMP 2 HRS EXCEED—Activated when the Pump 2 Actual Hours exceeds the user-specified limit.
To reset, Actual Hours must be reset to 0.
7.8 CANbus Communications
A Controller Area Network (CAN) is a specialized internal communication network. It allows a
Liebert XDP, Liebert XDC and Liebert XD Smart Modules to communicate without a host computer.
Networking the Liebert XDP or Liebert XDC to Smart Modules enables the Smart Modules to be
controlled and monitored from the Liebert XDP or Liebert XDC.
Figure 124 shows a typical Liebert XD system in a CANbus network. Liebert XD Smart Modules
should be connected to the Liebert XDP or Liebert XDC that supplies the modules with refrigerant.
Figure 124 Liebert XD system with CANbus
NOTE
Only six Liebert XDV10S* are shown. A maximum of 16 Liebert XDV10S*, a maximum of 20
Liebert XDV8S*, maximum of eight single-circuited Liebert XDH20S*, five single-circuited
Liebert XDH32S*, maximum of eight Liebert XDO20S*, or a maximum of 10 Liebert XDO16S*
can be connected together on a single CANbus.
Remote
Temperature/
Humidity
Sensor A
Remote
Temperature/
Humidity
Sensor B