High- And Low-Temperature And Humidity Events; User Inputs; Customer Inputs; Table 8 Customer Inputs - Emerson Liebert Challenger 3000 User Manual

3.8.1

High- and Low-Temperature and Humidity Events

High- and low-temperature and humidity alarms can be set for both the internal and optional exter-
nal sensors. If a sensor reading exceeds a preset threshold, a warning will appear. These warnings are
ignored after unit startup for a minimum of 1 minute. To increase the delay to warn, see 3.8 - Event
Types and Properties. The threshold settings are located in both the User and Service menus
under Set Alarms.
To apply threshold limits on the internal cooling unit sensors, the Return Sensor Alarms must be
enabled. The high and low temperature and humidity internal sensor thresholds can then be set. To
apply threshold limits on the optional external sensors, the Sensor A alarms must be enabled. The
high and low temperature and humidity external sensor thresholds can then be set. If no external
sensors are connected to the unit, it is recommended that the Sensor A Alarms be disabled.
NOTE
The event messages will automatically reset if the temperature/humidity stays 1.8°F
(1°C)/ 2% RH below or above the threshold for one minute.
3.8.2

User Inputs

The user can connect and specify up to four inputs depending on unit configuration. The user inputs
are digital inputs that can provide information about an event associated with the unit or space. The
customer input configuration settings are in the Service menu under Set Alarms, Screen 2 of 7. The
choices for the customer inputs are shown in Table 8 along with their associated reaction. A terminal
strip is provided in the cooling unit to connect your contact closure to. You have the ability to set the
control to react on an open or closed contact.
NOTE
To enabled/disabled, delay activation and set event type (alarm, warn, message) see Event
Types on page 34.
Table 8

Customer inputs

Setting
Smoke
Water Alarm
C PMP Alarm
Flow Alarm
Stdby G Pmp
Stdby Unit
C-Input 1
C-Input 2
C-Input 3
C-Input 4
Rht Lockout
Hum Lockout
Rht+Hum Lock
Comp Lockout
Call Service
High Temp
Air Loss
FC Lockout
Heater Alarm
Flow AL SD
Flow AL LC
Comp Lock PD
Enable FC
HTRJ VFD
HTRJ TVSS
Reaction
Event Only
Event Only
Event Only
Event Only
Event Only
Event Only
Event Only
Event Only
Event Only
Event Only
Event + Electrical Heaters Disabled
Event + Humidifier Disabled
Event + Electrical Heaters and Humidifier Disabled
Event + Compressor(s) Disabled w/o Pump Down
Event Only
Event Only
Event Only
Event + Free Cooling Disabled
Event + Heaters Off (PeX Only)
Event + Shut Down the Unit
Event + Lockout Compressors, No Pump Down (enabled only if at
least one compressor is on; auto-reset depends on input status)
Event + Compressor(s) Disabled w/ Pump Down
Forces Free Cooling to On
Activates the HEAT REJ VFD ALARM; no other function
Activates the HEAT REJ TVSS ALARM; no other function
36
Operation