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SCU 123
3
Operation and function
3.1
Push buttons
operating control lamp
backward
(selection / adjustment mode)
3.2
System monitoring display
channel display
system screen with symbols and tool bar
| 6
forward
2
1
3
SET
The controller is operated via three push buttons below the
display.
Button 1 is used for scrolling forward through the indication
menu or to increase the adjustment values. Button 2 is used
for scrolling backward and reducing values. Button 3 is used
for selecting channels and confirming adjustments.
During normal operation, only the display channels are
shown.
Î Scroll through the display channels by pressing buttons
1 and 2
Accessing the adjustment channels:
Î Scroll down in the display menu and press button 1 for
approx. two seconds after you have reached the last
display item.
When an adjustment value is shown on the display,
is indicated to the right of the channel name.
Î Press button 3 in order to access the adjustment mode
starts flashing.
Î Adjust the value using buttons 1 and 2
Î Briefly press button 3,
adjusted value will be saved.
The system monitoring display consists of three blocks:
channel display, tool bar and system screen (active
system layout).
The channel display consists of two lines. The upper line is an
alpha-numeric 16-segment display (text display) for displaying
channel names and menu items. In the lower 7-segment
display, the channel values and the adjustment parameters
are displayed. Temperatures are either indicated in °F or
°C, whereas temperature differences are indicated in K or
°Ra respectively.
The additional symbols of the tool bar indicate the current
system status.
Status
An adjsutmen value is being changed -
SET mode
relay 1 active
relay 2 active
maximum tank temperature exceeded
tank emergency shutdown active
collector emergency shutdown active
collector minimum limitation active
antifreeze function activated
antifreeze function active
manual operation relay 1 ON
manual operation relay 2 ON
manual operation relay 1 / 2 OFF
sensor defective
permanently appears,the
standard flashing
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