16
OMM 1008-1
Keypad
A 4-line by 20-character/line liquid crystal display and 6-button keypad is mounted on the controller. Its
layout is shown below.
Figure 4, Controller Keypad
Air Condit ioning
ALARM
VIEW
SET
<
<
<
The four arrow keys (UP, DOWN, LEFT, RIGHT) have three modes of use:
•
Scroll between data screens in the direction indicated by the arrows (default mode).
•
Select a specific data screen in the menu matrix using dynamic labels on the right side of the display such
as ALARM, VIEW, etc (this mode is entered by pressing the MENU key). For ease of use, a pathway
connects the appropriate button to its respective label on the screen.
•
Change field values in setpoint programming mode according to the following table:
LEFT key = Default
RIGHT key = Cancel
UP key = Increase (+)
DOWN key = Decrease (-)
These four programming functions are indicated by one-character abbreviation on the right side of the
display. This programming mode is entered by pressing the ENTER key.
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.
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 as shown in Figure 4. One of these choices can then be selected by
pressing the key connected to it via the pathway shown in the figure.
b)
Depending on the top-level selected, a second level of screens will appear. For example, selecting
ALARM will go the next level of menus under ALARM (ALARM LOG or ACTIVE ALARM).
Selecting VIEW will go the next level of menus (VIEW COMPRESSOR STATUS, VIEW UNIT
STATUS, VIEW EVAPORATOR, or VIEW CONDENSER). Selecting SET will go to a series of
menus for looking at and changing setpoints.
ENTER Key with
Green Run Light
Behind
MENU Key
ARROW Keys (4)
Key-to-Screen Pathway
Red Alarm Light Behind
