Operating Manual Krantz
VIRUS
PROTECT
Page
17
Subject to technical changes.
8.6
Device Warning Messages
If one of the warning messages listed below appears, the background color of the display changes to
red and the warning message is shown as plain text on the display.
In order to continue filtering, the device does not switch off when a warning is pending but
remains in operation.
The warning message (red background color and plain text display) disappears after the fault has
been rectified.
8.6.1 CO
2
Limit Reached
The CO
2
sensor integrated in the device permanently records the CO
2
concentration and displays it
in plain text.
When the set warning value (1,000ppm) is reached, the warning message CO
2
LIMIT VALUE
REACHED appears. Index values and limit values are set at the factory. See section 8.7.
To remedy: Ventilate the room to reduce the CO
2
concentration.
After the current CO
2
concentration has fallen below the threshold set value
(850ppm), the warning message is automatically reset.
8.6.2 Change Pre-
F
ilter Element
The differential pressure transducer integrated in the device permanently records the pressure
differential of the pre-filter stage and displays it as plain text.
When the set warning value is reached, the warning message CHANGE PRE-FILTER ELEMENT
appears. Index values and limit values are set at the factory. See section 8.7.
To remedy: Change the pre-filter element. See section 9.1.
After the current differential pressure has fallen below the set warning value, the
warning message is automatically reset.
