Common Alarm Enable. Emerson Liebert Prop Fan Condensing Unit

Microprocessor Control

3.14

Common Alarm Enable

Each individual alarm can be selected to activate or deactivate the common alarm relay. If the energize common alarm function is set to Yes, the relay is energized immediately as the alarm is annunciated and de-energized when the alarm condition has been recognized. If the alarm is completely

Disabled, the alarm has no effect on the common alarm relay. Use the Up and Down arrows to scroll to a particular alarm, press the Enter button to select it, then press the Enter button again to select

Yes or No.

3.15

Custom Alarms

The custom alarm messages can be selected from a list of standard alarm messages or the operator can write his/her own message. A MAXIMUM OF TWO (2) ALARM MESSAGES CAN BE CUSTOM-

IZED. The two custom alarm messages will initially display the previously programmed message but can be changed.

The text for custom alarms can be changed at any time by selecting Custom Alarm. To change the text for a custom alarm, select the alarm you would like to change, 1 or 2. Using the Up and Down arrows, step through the list of five standard alarm messages (listed below) and two custom alarms. Select the alarm message desired and store it by pressing Enter.

• STANDARD CUSTOM ALARM MESSAGES

• WATER FLOW LOSS

• SMOKE DETECTED

• LOSS OF AIR FLOW

• HUMIDIFIER PROBLEM

• FILTER CLOG

3.16

Custom Text

To modify the two custom alarm messages select “CUSTOM TXT”. Then select “CUS TXT #1” or “CUS

TXT #2”. Text can be up to 20 characters in length and can be either a blank space or any of the following alphanumeric characters and symbols:

• A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z

• #,%,*,-

• 0,1,2,3,4,5,6,7,8 or 9

Use the Up and Down arrows to select a character, then press Enter. The cursor will move to the next space where you may once use the Up and Down arrows to select another character, etc.

LCD Display Contrast

The level of contrast due to the viewing angle of the LCD display can be adjusted using a potentiometer screw, inside the wall box next to the display.

Nonvolatile Memory

All critical information is stored in nonvolatile memory. Setpoints and setup parameters are kept inside the microcontroller in EEPROM.

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