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9.3.2.
Air filter replacing / anti-frost protection indicator
Flashing yellow led indicates:
flashing consistently
it is necessary to replace filters
yellow and green leds flash in turns anti-frost protection is on
Control panel indicates the necessity to replace filters after 6 months of uninterruptable Unit operation
by consistent flashing of yellow led. Disconnection of the Unit from mains supply does not reset the
counter.
During cold season of a year green and yellow leds flashing in turns indicate that anti-frost protection
has been activated, the electric preheater is on.
IMPORTANT!
Filters may need to be replaced more frequently – refer to section 9.4 "Replacing air
filters".
IMPORTANT!
Higher than usually power consumption is to be expected when the Unit is operating
in this mode.
9.3.3.
Failure indicator
The flashing red led indicates that failure of the Unit component was detected:
flashes 1 time
failure of outside air temperature sensor
flashes 2 times
failure of exhaust air temperature sensor
flashes 3 times
failure of supply air temperature sensor
flashes 4 times
failure of extract air temperature sensor
flashes 5 times
failure of supply fan motor
flashes 6 times
failure of exhaust fan motor
flashes 7 times
fire alarm has been activated
flashes 8 times
failure of preheater
both red and yellow leds are on (no
flashing)
connection between control panel and the Unit was lost and
the Unit is operating in safe mode
Unit operation will stop after detecting component failure. You can restart the Unit by following RESET
procedure:
