Compressor Controller; Navigating - McQuay WSC Operating Manual

Compressor Controller

A general description of the unit controller with its inputs and outputs is on page 8. This section
will briefly describe the operation of the controller, define the screen hierarchy and how to
navigate through it and also give a description of the screens.
Relevant compressor information and setpoint changes are available on the OITS and on the unit
controller. There is little need to consult the compressor controller(s).
4x20 Display & Keypad
Layout
The 4-line by 20-character/line liquid crystal display and 6-key keypad are shown below.
Figure 32, Display (in MENU mode) and Keypad Layout
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.
There are two ways to navigate through the menu matrix to reach a desired menu screen.
One is to scroll through the matrix from one screen to another using the four ARROW keys.
The other way is to use shortcuts to work through the matrix hierarchy. From any menu screen,
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 32. One of these groups of screens can then be
selected by pressing the key connected to it via the pathway.
OM Centrif Micro ΙΙ-5
Key to Screen Pathway
Air Conditioning
<
<
<
ARROW Keys
ALARM
VIEW
SET
MENU Key
ENTER Key
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