User's Manual

Operation
71 Liebert
®
iCOM
®
3.10.2 User Inputs
The user can connect and specify up to four custom alarm inputs, also known as remote alarm devices
(RAD), depending on unit configuration. Two optional customer inputs are available on some cooling
units. The optional inputs are not available on units equipped with low-pressure switches on Liebert
DX equipment. Low-pressure transducers may be field-installed in lieu of low pressure switches if
additional customer inputs are desired.
Each input can be programmed to provide information about an event associated with the unit or
space.
Each standard inputs is wired to Terminal 24 through a dry contact to locations 50, 51, 55 and 56,
respectively, for Alarms 1 through 4 (see the unit’s electric schematic and installation manual
terminal location).
The customer input configuration settings are in the Service menu under Set Alarms, Screen 3 of 11.
The choices for the customer inputs are shown in Table 12 along with their associated reaction. The
customer inputs can be programmed as normally open or normally closed to alarm.
NOTE
To enabled/disabled, delay activation and set event type (alarm, warn, message) see Event
Types on page 68.
Table 12 Customer inputs
Setting Reaction
Smoke Event Only
Water Alarm Event Only
C PMP Alarm Event Only
Flow Alarm Event Only
Stdby G Pmp Event Only
Stdby Unit Event Only
C-Input 1 Event Only
C-Input 2 Event Only
C-Input 3 Event Only
C-Input 4 Event Only
Rht Lockout Event + Electrical Heaters Disabled
Hum Lockout Event + Humidifier Disabled
Rht+Hum Lock Event + Electrical Heaters and Humidifier Disabled
Comp Lockout Event + Compressor(s) Disabled w/o Pump Down
Call Service Event Only
High Temp Event Only
Air Loss Event Only
FC Lockout Event + Free-Cooling Disabled
Heater Alarm Event + Heaters Off
Flow AL SD Event + Shut Down the Unit
Flow AL LC
Event + Lockout Compressors, No Pump Down (enabled only if at
least one compressor is On; auto-reset depends on input status)
Comp Lock PD Event + Compressor(s) Disabled w/ Pump Down
Enable FC Forces Free-Cooling to On
HTRJ VFD Activates the HEAT REJ VFD ALARM; no other function
HTRJ SPD Activates the HEAT REJ SPD ALARM; no other function
FIRE ALARM Event + Shuts the Unit Down
2
ND
SETPOINT No Event But Switches To The Second Setpoint
NO POWER Event + Disables Unit
LSI
Event + Activates Humidifier Problem Alarm and Stop Filling
Bottle When Full