11
11
6. TROUBLESHOOTING
⚠
WARNING
Risk of electric shock. Before performing any maintenance or servicing, always
disconnect the unit from its power source or turn power off at service panel.
NO
NO
NO
Unit is noisy
Inspect the unit for damage during
transportation (warped or kicked
housing for example). Perform a
visual inspection of the inside of the
unit. Is any component touching
the blower wheel or is there any
damage?
Remove any debris or contact
customer service if damaged.
Perform a visual inspection of the damper.
Can the damper open and close normally?
(The damper is held closed by a magnet. It is
normal to feel some resistance when
opening it.)
Replace the motor
Remove any obstacle hindering
damper movement. If accumulated
dust caused this issue, make sure
that the filter is present, and consider
using an optional MERV filter.
Unit does not
deliver required
airflow
Are the airflow
settings properly
set?
Restore proper
settings
Are the filter, outdoor
hood or distribution
grille clogged or
blocked?
Is the measuring tool
accurate? Try using a
different tool.
Calibrate tool
Damper does not
close
If the ductwork of the supply fan
is connected to the ductwork of
an AHU, turn OFF the AHU
temporarily.
Is the damper now closed?
Make sure that the unit
ductwork is connected to
the supply ductwork of the
AHU, and not on the
return ductwork.
Perform a visual inspection of the
damper. Make sure that the damper
can open and close freely. Remove
any obstacle hindering damper
movement. If accumulated dust
caused this issue, make sure that the
filter is present, and consider using
an optional MERV filter.
Replace or clean
clogged parts
NO
NO
YES
YES
YES
YES
YES
NO
YES
NO
Unit does not work
If the unit is connected to
the ductwork of an AHU,
turn OFF the AHU. Open
unit’s door and validate
that unit really does not
work.
Use a small electric
appliance to test the wall
outlet. Does the wall
outlet work properly?
Refer to an
electrician
Are both motor
connectors (J2
and J10) well
connected to
the electronic
board?
Restore connections
Is the fuse
located on the
electronic board
blown?
Replace the
electronic
Board.
If this is a
recurrent issue, it
may indicate that
the motor has to
be replaced.
Replace the
motor
NO
YES
NO
YES
YES
