Emerson 3000/ITR User Manual
Alarm Descriptions
35
6.2
Optional Alarms
6.2.1 Loss of Water Flow
Available only with 3-way valves and occurs when no water flow is detected in the chilled water or
condenser water supply line. An optional flow switch is required for this alarm. Check for service
valves closed, pumps not working, etc.
6.2.2 Smoke Detected
Smoke is detected in the return air by an optional Liebert Smoke Detector. Check for source of smoke
or fire, and follow appropriate emergency procedures.
6.2.3 Standby GC Pump On
The primary pump has failed, and the standby pump is activated (glycol cooled and GLYCOOL units
only).
Check for problems with the primary pump (fuses blown, motor burnout, service valve shut, stuck
Check for problems with the primary pump (fuses blown, motor burnout, service valve shut, stuck
check valve, impeller damage, etc.).
6.2.4 Standby Unit On
The primary environmental control system has had an alarm condition, and the standby system is
activated.
6.2.5 Water Under Floor
Water is detected by an optional Liebert Water Detection System. Check under the raised floor for
water or other leaks.
6.3
Set Alarms—User Menus
NOTE
The alarms are specified by the customer at the time of order. All alarms will report to a
The alarms are specified by the customer at the time of order. All alarms will report to a
Liebert remote monitoring unit. Additional devices and wiring may be required at the factory
for some of the alarms.
Table 3
Set alarms—User Menus
Large Display
Small
Display
Alarm Description
Range
Large
Display
Range
Small
Display
Res.
Std.
U201
PASSWORD
-
-
-
-
-
-
U202
Return Sensor
Alarms
RTN SNSR
Std. Sensor
Alarms Enable
0 = Disabled
1 = Enabled
0 = No,
1 = Yes
-
Enabled
U203
High Return
Temperature
HI TEMP
Std. Sensor High
Temperature Alarm
34-210 °F
(1-99°C)
34-210 °F
1-99°C
1
80°F
27°C
U204
Low Return
Temperature
LO TEMP
Std. Sensor Low-
Temperature Alarm
34-210 °F
(1-99°C)
34-210 °F
(1-99°C)
1
65°F
18°C
U205
High Return
Humidity
HI HUM
Std. Sensor High-
Humidity Alarm
1-99%
1-99%
1
60%
U206
Low Return
Humidity
HI HUM
Std. Sensor Low
-Humidity Alarm
1-99%
1-99%
1
40%
U207
Sensor A
Alarms
SENSOR A
Sensor A
Alarms Enable
0 = Disabled
1 = Enabled
0 = No,
1 = Yes
-
Disabled
U208
High-Temperature
Sensor A
HI TEMPA
Sensor A
High-Temperature Alarm
34-210 °F
(1-99°C)
34-210 °F
(1-99°C)
1
90°F
32°C
U209
Low Temperature
Sensor A
LO TEMPA
Sensor A Low-
Temperature Alarm
34-210 °F
(1-99°C)
34-210 °F
(1-99°C)
1
55°F
13°C
U210
High Humidity
Sensor A
HI HUM A
Sensor A
High-Humidity Alarm
1-99%
1-99%
1
70%
U211
Low Humidity
Sensor A
LO HUM A
Sensor A
Low-Humidity Alarm
1-99%
1-99%
1
30%