OM Centrif Micro ΙΙ-5 43
Unit Controller
A general description of the unit controller with its inputs and outputs is on page 7. This section
will describe the operation of the unit controller, define the screen hierarchy and how to navigate
through it and also give a description of the screens.
4x20 Display & Keypad
Layout
The 4-line by 20-character/line liquid crystal display and 6-key keypad are shown below.
Figure 27, Display (in MENU mode) and Keypad Layout
Air Conditioning
VIEW
SET
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<
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Note that each ARROW key has a pathway to a line in the display. Pressing an ARROW key will
activate the associated line when in the MENU mode.
Getting Started
There are two basic procedures to learn in order to utilize the MicroTech II controller:
1. Navigating through the menu matrix to reach a desired menu screen and knowing where a
particular screen is located.
2. Knowing what is contained in a menu screen and how to read that information or how to
change a setpoint contained in the menu screen.
Navigating
The menus are arranged in a matrix of screens across a top horizontal row. Some of these top-
level screens have sub-screens located under them. The general content of each screen and its
location in the matrix begins in Figure 29 on page 44. A detailed description of each menu screen
begins on page 46.
There are two ways to navigate through the menu matrix to reach a desired menu screen.
1) One is to scroll through the matrix from one screen to another using the four ARROW keys.
2) Another way is to use shortcuts to work through the matrix hierarchy. From any menu screen,
a) Pressing the MENU key will take you to the top level of the hierarchy. The display will
show ALARM, VIEW, and SET. One of these groups of screens can then be selected by
pressing the key connected to it via the pathway.
ENTER Key
MENU Key
ARROW Keys
Key-to-Screen Pathway
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