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5.4 Filter replacement
The control unit determines when the filter
should be replaced, depending on the re-
quired air flow rate. As soon as a filter re-
quires replacement, the LEDs flash steadily.
Pressing the two round buttons in the mid-
dle confirms filter replacement and resets
the interval.
6 Troubleshooting
Fault
Fan not
responding.
LEDs flashing
steadily.
Cause
Installation or mainte-
nance fault.
Filter replacement
interval elapsed.
INFORMATION
The optimum time until filter replacement
can vary depending on local environmental
influences.
Solution
•
Check the cabling to the fan and
control unit.
Check the filter; replace if necessary.
•
•
Press the two middle buttons to
confirm filter replacement.
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