Sidewall Propeller Fans
7
®
PROBLEM
CAUSE
CORRECTIVE ACTION
Too much airflow Resistance lower than designed
Decrease fan speed.
Reduced airflow
System resistance too high
Check backdraft dampers for proper operation. Remove obstructions in
ductwork. Clean dirty filters. Check for adequate supply air for exhaust
fans or exhaust air for supply fans.
Fan too close to damper
Increase distance between fan and damper.
Fan speed too low
Increase fan speed.
Excessive dirt buildup on propeller
Clean propeller.
Excessive noise
Excessive vibration
Clean dirt buildup from propeller. Check all setscrews and fasteners for
tightness. Check for worn bearing. Correct propeller imbalance. Check
for loose dampers, guards or ductwork.
Defective motor
Replace motor.
Variable frequency drive (VFD)
Check VFD for drive setting, some controllers are able to be adjusted
to lower the harmonic noises sometimes heard during operation by
adjusting a simple setting on the controller.
Debris
Remove all debris from the fan.
Fan does not
operate
Electrical supply
Check fuses/circuit breakers. Check for switches turned off or
disconnected. Check for correct supply voltage.
Motor
Assure motor is correct horsepower and not tripping overload protector.
WARNING
Before taking any corrective action, make certain unit is not capable of operation during repairs.
Troubleshooting
1. Fan Panel
2. Propeller
3. Venturi Insert
4. Corner Brackets (4)
5. Drive Frame Upper Arm (2)
6. Motor
7. Motor Plate
8. Drive Frame Lower Arm (2)
1
1
2
2
3
3
4
4
5
5
6
Exhaust
Airflow
Exhaust
Airflow
Airflow
Supply
Airflow
Supply
Exhaust
Airflow
Airflow
Supply
1
2
3
4
5
6
7
8
Direct Drive AER-M
Each fan bears a manufacturer’s nameplate with model number and serial number embossed. This information
will assist the local representative and the factory in providing service and replacement parts. Before taking any
corrective action, make certain unit is not capable of operation during repairs.
Parts List
