5
Troubleshooting
Topics Covered in this Chapter
Troubleshooting Guide
Symptom
Probable Cause(s)
Corrective Action(s)
Excessive noise.
Defective motor bearing.
Replace.
Defective pillow block bearing.
Replace.
Parts are not securely anchored.
Check all bolts, screws and fasteners.
Damaged fan blade.
De-energize fan. Turn prop and check tip
clearance. Do they appear to be approxi-
mately the same?
NOTE:
They can be a little different without
any problems.
If they are significantly different, contact your
distributor for more information.
Fan inoperative.
Electricity is turned OFF.
Contact local utility supplier.
Belt is broken.
Replace.
Defective motor.
Replace.
Open power supply circuit.
Replace fuse or reset circuit breaker. Check
for disconnected, cut or damaged power
cord.
Insufficient airflow.
Intake/exhaust shutter is jammed/
clogged.
Repair/replace/clean as necessary.
Inlet/outlet guards clogged by dirt/
debris.
Repair/replace/clean as necessary.
Voltage supplied is not correct (must
be within ±10% of the nominal
voltage).
Check line voltage at motor, verify wiring.
Check with local utility supplier for possible
line problems.
Excessive vibration.
Fan blade has excessive dirt build-
up.
Clean unit.
Motor/drive shaft is bent.
Replace.
Fan blade is bent or otherwise
damaged.
Replace blade. Apply anti-seize lubricant to
the shaft.
PNEG-2054
54" Galvanized Butterfly Panel Fan
37
