U
SER
AND MAİNTENANCE MANUAL
www.airflow.com
19
14. TROUBLESHOOTING
Failure
Reason
Solution
Outdoor air
coming into
the dwelling is
cold
.
•Air cools down in the attic ducts"
✓
Check the duct insulation
•The heat exchangers frozen which is
why extract air cannot heat the
incoming air.
✓
If the heat exchanger frozen
contact your supplier/installer to
reduce the set point of the frost
protection facility
•The extract fan is not running.
✓
Contact your supplier/installer.
•The extract air filter or the heat
exchanger is clogged.
✓
Check that the filters and the
heat exchanger are clean.
The unit has
been switched
of
f
unexpectedly
.
•Mains voltage failure
✓
Consult a qualified electrician to
check mains power supply to units.
The unit makes a
lot of noise.
Rumbling/Ratting noise
✓
Contact your supplier/installer.
Fan motor fault
Water leakage
near the unit.
Condensate trap is clogged of frozen.
✓
Check the condensate drain and
clean it, if necessary change it.
Condensate pipe is has come loose.
Unpleasant smell
near the unit.
Condensate trap (U-bend) below the
unit is empty.
✓
Fill the condensate trap with
water.
The condensate pipe is not
completely in the trap.
✓
Push the pipe deeper into the
trap.
The condensate pipe or condensate
trap is blocked of frozen.
✓
Check the condensate drain and
clean it, if necessary
