Fantech AEV Series Installation Manual - Troubleshooting
14
Troubleshooting
Problem
Causes
Solutions
Air is too dry
Dehumidistat control is set too low
Increase the desired level of humidity. Change ventilation mode from
continuous mode to standby.
AEV out of balance
Balance AEV
Air is too humid
Dehumidistat control is set too high
Reduce the desired level of humidity. Combine this with the use of
continuous exchange mode.
Sudden change in temperature
Wait until outside temperature stabilizes (winter). Heating will also
improve situation.
Storing too much wood for heating
Store a majority of your wood outside. Even dried, a cord of wood contains
more than 20 gallons of water.
Dryer vent exhaust is inside home
Arrange outside vent for dryer
Poor air circulation near windows
Open curtains or blinds. Bay or bow windows may require mechanical
method
AEV out of balance
Balance AEV
Basement door is closed
Open the door or install a grill on the door
Persistent condensation
on window
Improper adjustment of dehumidistat control
Reduce the desired level of humidity. Combine this step with use of
continuous exchange mode.
AEV out of balance
Balance AEV
Poor Air Flows
1/4" (6mm) mesh on the outside hoods is plugged
Clean exterior hoods or vents
Filters plugged
Remove and clean filter
House grilles closed or blocked
Check and open grilles
Damper are close if installed
Poor power supply at site
Have electrician check supply voltage at house
Ductwork is restricting thE AEV
Check duct installation
Improper speed control setting
Increase the speed of the AEV
AEV airflow improperly balance
have contractor balance AEV
Supply air feels cold
Poor location of supply grilles, the airflow may ir-
ritate the occupant
Locate the grilles high on the walls or under the baseboards, install ceiling
mounted diffuser or grilles so as not to directly spill the supply air on the
occupant (eg. Over a sofa)
Turn down the HRV supply speed. A small duct heater (1kw) could be used
to temper the supply air
Placement of furniture or closed doors is restricting the movement of air
in
the home
Outdoor temperature extremely cold
If supply air is ducted into furnace return, the furnace fan may need to run
continuously to distribute ventilation air comfortably
aev and/or Ducts frosting up
AEV air flows are improperly balanced
Have HVAC contractor balance the AEV
Malfunction of the AEV defrost system
Note: minimal frost build-up is expected
Duct heaters
Condensation or Ice Build Up in
Insulated Duct to the Outside
Incomplete vapor barrier around insulated duct
Tape and seal all joints
A hole or tear in outer duct covering
Tape any holes or tears made in the outer duct covering
Ensure that the vapour barrier is completely sealed.