©
Viessmann 5443202
|
14
SCU124
The system monitoring display consists of three blocks:
channel display, tool bar and system screen (active
system layout).
The channel display consists of 2 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 tem-
perature differences are indicated in K or °Ra respectively.
channel display
The additional symbols of the tool bar indicate the current
system status.
tool bar
2. Operation and function
2.1 Push buttons
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. But-
ton 2 is used for scrolling backward and reducing values.
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 the forward
button (1) for approx. 2 seconds after you have reached
the last display item.
When an adjustment value is shown on the display, SET
is indicated to the right of the channel name.
Î
Press the “Set” button (3) in order to access the ad-
justment mode
SET starts flashing.
Î
Adjust the value using buttons 1 and 2
Î
Briefly press button 3, SET permanently appears,the
adjusted value will be saved.
2.2 System monitoring display
system monitoring display
1
3
2
backward
forward
SET
(selection / adjustment mode)
operating control lamp
Status
standard flashing
relay 1 active
relay 2 active
maximum tank temperature exceeded
tank emergency shutdown active
+
collector emergency shutdown active
collector cooling active
system cooling active
tank cooling active
+
holiday cooling function activated
holiday cooling function 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
