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INFORMATION
The optimum time until filter replacement
can vary depending on local environmental
influences.
6 Troubleshooting
Fault
Cause
Solution
Fan not
responding.
Installation or mainte-
nance fault.
• Check the cabling to the fan and
control unit.
LEDs flashing
steadily.
Filter replacement
interval elapsed.
•
Check the filter; replace if necessary.
• Press the two middle buttons to
confirm filter replacement.
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.
