Operation And Function; Push Buttons; System Monitoring Display - Viessmann SCU224 User Manual

SCU224

2. Operation and function

2.1 Push buttons

operating control lamp
backward
(selection / adjustment mode)

2.2 System monitoring display

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system monitoring display
channel display
tool bar
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forward
2 1
3
SET
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!
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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. two 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.
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 tem-
perature differences are indicated in K or °Ra respectively.
The additional symbols of the tool bar indicate the current
system status.
Status
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
standard flashing
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