Emerson Liebert iCOM Manual De Usuario

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.

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