Alarm Descriptions

6.2Optional Alarms

6.2.1Loss 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.

6.2.2Smoke 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.

6.2.3Standby 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 valve, impeller damage, etc.).

6.2.4Standby Unit On

The primary environmental control system has had an alarm condition, and the standby system is activated.

6.2.5Water Under Floor

Water is detected by an optional Liebert Water Detection System. Check under the raised floor for water or other leaks.

NOTE

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.

6.3Set Alarms—User Menus

Table 3

Set alarms—User Menus

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Range

Range

 

 

 

 

Small

 

Large

Small

 

 

 

Large Display

Display

Alarm Description

Display

Display

Res.

Std.

U201

PASSWORD

-

-

-

-

-

-

U202

Return Sensor

RTN SNSR

Std. Sensor

0 = Disabled

0 = No,

-

Enabled

Alarms

Alarms Enable

1 = Enabled

1 = Yes

 

 

 

 

U203

High Return

HI TEMP

Std. Sensor High

34-210 °F

34-210 °F

1

80°F

Temperature

Temperature Alarm

(1-99°C)

1-99°C

27°C

 

 

 

U204

Low Return

LO TEMP

Std. Sensor Low-

34-210 °F

34-210 °F

1

65°F

Temperature

Temperature Alarm

(1-99°C)

(1-99°C)

18°C

 

 

 

U205

High Return

HI HUM

Std. Sensor High-

1-99%

1-99%

1

60%

Humidity

Humidity Alarm

 

 

 

 

 

 

U206

Low Return

HI HUM

Std. Sensor Low

1-99%

1-99%

1

40%

Humidity

-Humidity Alarm

 

 

 

 

 

 

U207

Sensor A

SENSOR A

Sensor A

0 = Disabled

0 = No,

-

Disabled

Alarms

Alarms Enable

1 = Enabled

1 = Yes

 

 

 

 

U208

High-Temperature

HI TEMPA

Sensor A

34-210 °F

34-210 °F

1

90°F

Sensor A

High-Temperature Alarm

(1-99°C)

(1-99°C)

32°C

 

 

 

U209

Low Temperature

LO TEMPA

Sensor A Low-

34-210 °F

34-210 °F

1

55°F

Sensor A

Temperature Alarm

(1-99°C)

(1-99°C)

13°C

 

 

 

U210

High Humidity

HI HUM A

Sensor A

1-99%

1-99%

1

70%

Sensor A

High-Humidity Alarm

 

 

 

 

 

 

U211

Low Humidity

LO HUM A

Sensor A

1-99%

1-99%

1

30%

Sensor A

Low-Humidity Alarm

 

 

 

 

 

 

35

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Emerson 3000/ITR manual Optional Alarms, Set Alarms-User Menus
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3000/ITR specifications

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