RadonTec 50-012, Manual, Page: 29 / 34

29 Manual – AlphaFreshbox 60
per year. You can find replacement filters for both supply and
exhaust air in our RadonShop.
Clean the heat exchanger regularly to maintain its high heat
recovery efficiency. Remove the heat exchanger of the unit
prior to the cleaning operation. Clean the heat exchanger with
a vacuum cleaner or flush it under running water.
10 Troubleshooting
Problem Possible reasons / handling
The fan does
not start up.
No power supply.
Make sure that the unit is properly
connected to the power mains and make any
corrections, if required.
The motor is jammed, the impeller blades are
clogged.
•Turn the unit off. Troubleshoot the motor
jam.
•Clean the blades.
•Restart the unit.
Automatic
switch tripping.
Overcurrent resulted from short circuit in
the electric circuit.
•Turn the unit off.
•Contact the service centre.
Low supply air
temperature.
The extract filter is clogged.
Clean or replace the extract filter.