Troubleshooting - Greenheck AER Installation, Operation And Maintenance Manual

Troubleshooting

WARNING
Before taking any corrective action, make certain unit
is not capable of operation during repairs.
PROBLEM
Too much airflow Resistance lower than designed
System resistance too high
Reduced airflow
Fan too close to damper
Fan speed too low
Excessive dirt buildup on propeller
Bearings
V-belt drive
Excessive vibration
Excessive noise
Defective motor
Variable frequency drive (VFD)
Debris
Electrical supply
Fan does not
operate Drive
Motor
Maintenance Documentation
Job Information
Job Name: ___________________________________ Service Organization: __________________________________
Address: _____________________________________ Address: _____________________________________________
City: ________________________________________ City: _________________________________________________
State: _______________
Phone: ______________________________________ Phone: ______________________________________________
Contact Person: ______________________________ Work Done By: _______________________________________
Nameplate Information
Model: ______________________________________
Volts: _________ Hertz: ________
Amps: _______________
Supply hp: ___________
Serial Number: _______________________________ Air Volume:
Model Voltage: _______________________________
Motor Amperage: _____________________________ Level of fan (L or H): ___________________________________
Fan RPM: ____________________________________ Fan RPM Range (min.) ____________ (max.) _____________
6 Sidewall Propeller Fans
CAUSE
Zip: __________________ State: _______________
Phase: ______ Actual Voltage: _______
Mark: ________________ Actual Amperage: _____________________________________
Exhaust hp: ___________ Blower Rotation: ______________________________________
Avant d'entreprendre toute action corrective, s'assurer
que l'appareil ne pourra pas fonctionner durant les
réparations.
CORRECTIVE ACTION
Decrease fan speed.
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.
Increase distance between fan and damper.
Increase fan speed.
Clean propeller.
Tighten collars and fasteners. Lubricate bearings. Replace defective
bearings.
Tighten pulleys on motor and fan shaft. Adjust belt tension. Align
pulleys properly. Replace worn belts or pulleys. See Maintenance.
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.
Replace motor.
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.
Remove all debris from the fan.
Check fuses/circuit breakers. Check for switches turned off or
disconnected. Check for correct supply voltage.
Check for broken or worn belts. Tighten loose pulleys.
Assure motor is correct horsepower and not tripping overload protector.
Field Start-Up Documentation
Design cfm: _____________________________
Actual cfm: ______________________________
AVERTISSEMENT
Zip: __________________________
Hertz: ______ Phase: _________
®