Operating Manual Krantz
VIRUS
PROTECT
Page
18
Subject to technical changes.
8.6.3
Change HEPA Filter Element
The differential pressure transducer integrated in the device permanently records the pressure
differential of the HEPA filter stage and displays it as plain text.
When the set warning value is reached, the warning message CHANGE HEPA FILTER ELEMENT
appears. Index values and limit values are set at the factory. See section 8.7.
To remedy: Change the HEPA filter element. See section 9.2.
After the current differential pressure has fallen below the set warning value, the
warning message is automatically reset.
8.6.4 Service Required
The controls count the total number of operating hours, i.e. the hours in which the fan has been in
operation, independent of the preset volume flow.
When the set warning value is reached, the warning SERVICE REQUIRED appears. Index values
and limit values are set at the factory. See section 8.7.
To remedy: Service the device. See section 9.3.
The operating hours counter is reset by pressing and holding down the F4 button for
at least 3 seconds. A reset is only possible if the message SERVICE REQUIRED is
present.
8.7
Index and Limit Values
The following index and limit values are set at the factory.
Volume flow, level 1
[m³/h]
250
Volume flow, level 2
[m³/h]
500
Volume flow, level 3
[m³/h]
750
Volume flow, level 4
[m³/h]
1,000
Warning
CHANGE PRE-FILTER ELEMENT
[Pa]
250
Warning
CHANGE HEPA FILTER ELEMENT
[Pa]
400
Warning
CO
2
LIMIT REACHED
[ppm]
1000
Warning
SERVICE REQUIRED
[h
B
]
5,000
