A
E
R
A
A
I
R
I
N
N
O
V
A
T
I
O
N
45
FAULT
SYMPTOM
POSSIBLE CAUSE
SOLUTION
In the air handling
units, no airflow/mo-
tor not running
There is no
power supply to
the motor
Power be off
Check the electrical supply line.
Troubleshoot the fault.
Check motor connections, correct
if necessary.
Check terminals and contactors,
correct if necessary.
Thermal burnout
Contact the AERA Technical Team.
Control panel error
System connections are checked.
Main switch off
Turn on the main switch.
There is power
supply to the
motor
Incorrect connection to termi-
nals
Fix the connections.
Motor oils
Contact the AERA Technical Team.
Motor burned out
Contact the AERA Technical Team.
Damper/flaps may be closed
Check dampers and flaps, correct
if necessary.
In the air handling
units, no airflow/mo-
tor running
The fan wheel
not turning
Fan wheel and motor shaft
connection loose
Tighten the bushing, replace if
necessary.
The fan wheel is
spinning
Clogging in ducts
Check/remove congestion in the
duct.
Fan rotation direction is not
correct
Correct the fan rotation direction.
Damper closed in suction or
blowing
Check the damper positions, if it is
closed, open it.
Low airflow in air
handling units
Low airflow
Filters are dirty or clogged
Change or clean filters.
Coils dirty or clogged
Clean the coils.
External pressure loss higher
than the rated value
Check duct pressure losses and
duct design.
Fan rotation direction is not
correct
Correct the fan rotation direction.
There is a leak in the unit
Check the leak section.
Dampers do not clear enough
Check and correct damper posi-
tions.
High fan k factor value (in auto-
mation units)
Correct the K-factor value (in auto-
mation units)
Excessive
leakage on the
pressure side of
the system
Doors do not close properly/
fallen
Check the door gaskets and re-
place them if necessary.
Check the door hinges, adjust if
necessary.
Duct connections are not
isolated
Make duct connections sealed.
The fire damper may be closed. Check and open if necessary.
VAVs may be turned off, out
of adjustment, or incorrectly
selected.
Contact the mechanical installers.
The duct outlet may be closed
or clogged.
Check and remove clogging if
necessary