Entelli-Switch 250 Controller 
(cont’d) 
LCD & Keypad 
These options are accessible through the LCD and 
keypad (see figure below). To become familiar with the 
options loaded into a particular unit, scrolling through 
the SET and CFG menu will show the descriptions of 
the options (see pages 16-17). These menus are the very 
same menus that are used to access the setting and/or 
configuration of these options. The SET (setting) menu 
is primarily used to show or change, time and voltage 
settings. The CFG menu is primarily used to turn an 
option on or off.  When scrolling through these menus, 
no changes can be made without entry of the access code. 
The factory set six-digit access code is located on a white 
label on the back of the unit (see figure 10 pgs. 16-18). 
The Entelli-Switch 250 has many logic options. Each 
controller is downloaded with options at the time of 
manufacture. The collection of options that any one 
controller has is specified at the time of order placement. 
The following pages include all the options that can 
reside in the controller. Not all units include all options. 
Entelli-Switch 250 
S1  OK 
01: 50 
FRI 31 MAY 2003 
Source 2 (Red) 
indicates Source 2 
is acceptable for use 
Source 1 LED (Green) 
indicates Source 1 is 
acceptable for use 
Exercise Event 
"Impending" 
SET Menu 
MORE   CFG    TEST   SET 
#1 or the word 
on the LCD above the key. 
The word above the key 
changes depending on which 
screen is being displayed. 
#2 or the word 
on the LCD above the key. 
The word above the key 
changes depending on which 
screen is being displayed. 
#3 or the word 
on the LCD above the key. 
The word above the key 
changes depending on which 
screen is being displayed. 
#4 or the word 
on the LCD above the key. 
The word above the key 
changes depending on which 
screen is being displayed. 
Current Time, 
Day and 
Date of Display 
Source 1 Position LED (Green) 
indicates Power Panel (ATS) 
is closed to Source 1 position 
Source 2 Position 
LED (Red) indicates 
Power Panel (ATS) 
is closed to 
Source 2 position 
Menus (MORE, CFG, TEST) 
Keypad 
* E * 
LCD Screen 
 
   
 
Figure 8 
GE Zenith Controls 
ZTS / ZTSD Operation and Maintenance Manual (71R-3000) 
7