17 custom text, Lcd display contrast, Nonvolatile memory – Liebert 50 & 60Hz User Manual
Page 49: Equipment options switches, Table 15 switch settings (wallbox board), Custom text, Table 14, Equipment switch settings (unit control board), Table 15, Switch settings (wallbox board)
Microprocessor Control
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3.17 Custom Text
To modify the two custom alarm messages select “CUSTOM TEXT”. Then select “Custom Text #1,”
“Custom Text #2” or “Custom Text #3.” Text can be up to 16 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/DOWN arrows to select a character, then press ENTER. The cursor will move to the
next space where you may once use the UP/DOWN arrows to select another character, etc. The cus-
tom text alarm will be displayed only if the alarm is selected in Custom Alarms.
LCD Display Contrast
The level of contrast due to the viewing angle of the LCD display can be adjusted using a potentiome-
ter 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.
Equipment Options Switches
Equipment options are selected and enabled using DIP switches 1 through 7. These are located on the
control board near TB3. These switches are factory set and should not require any user changes. The
setting and function of the switches can be individually read on the LCD display.
NOTE
In order to update the DIP switch settings, power must be cycled off, then on, from the unit
disconnect switch.
Table 14
Equipment switch settings (unit control board)
Switch
OFF Position
ON Position
1
Step Cool
Ramp Cool
2
Step Heat
Ramp Heat
3
Not Used
Not Used
4
No GLYCOOL
GLYCOOL
5
Disable 1 stage CW
Enable 1 stage CW
6
Not used
Not used
7
1-stage
dehumidification
2-stage
dehumidification
8
Disable SCR Reheat
Enable SCR Reheat
Table 15
Switch settings (wallbox board)
Switch
OFF Position
ON Position
1
Beeper Disable
Beeper Enable
2
Not Used
Not Used
3
Not Used
Not Used
4
Enable Reheat
Disable Reheat
5
Enable Hum.
Disable Hum.
6
Enable Dehum.
Disable Dehum.
7
Disable Setback
Enable Setback
8
Enable Password
Disable Password