OM AGSB-5
9
Each chiller has one
unit
controller and a
circuit
controller for each compressor circuit (two
or three depending on unit size). The controllers are connected and communicate via a
pLAN (local area network). The circuit controllers communicate with, and control the
operation of, the compressor's solid state starter and the circuit electronic expansion valve
(EXV).
Keypad
A 4-line by 20-character liquid crystal display and 6-button keypad is mounted on the unit
and compressor controllers.
Figure 2, Keypad
Air Conditioning
ALARM
VIEW
SET
<
<
<
The four arrow keys (UP, DOWN, LEFT, RIGHT) have three modes of use.
1. Scroll between data screens in the direction indicated by the arrows (default mode).
2. 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.
3.
Change field values in setpoint programming mode as follows:
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.
ENTER Key & Green Run Light
MENU Key
ARROW Keys (4)
Key-to-Screen Pathway
Red Alarm Light
Summary of Contents for AGS 206A
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