6. User Servicing Instructions and Troubleshooting
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PNEG-2305
Aluminum Centrifugal Fan
Lubrication Intervals - Ball Bearing Motors
Troubleshooting Charts
Fan Troubleshooting Chart
Type of Annual Usage
1800 RPM - NEMA Frame Size
3600 RPM - NEMA Frame Size
Up to
280 incl.
Over 280
to 360 incl.
Over 360
Up to
280 incl.
Over 280
to 360 incl.
Over 360
Continuous Normal Duty *
9500 Hrs.
7400 Hrs.
3500 Hrs.
3600 Hrs.
2200 Hrs.
2200 Hrs.
Continuous Severe Duty **
4750 Hrs.
3700 Hrs.
1750 Hrs.
1800 Hrs.
1100 Hrs.
1100 Hrs.
Seasonal Service Motor (Idle 6 Months)
Lube at the
Beginning of Season
and then follow the
Appropriate Duty Interval
above.
* Clean, Little Corrosion with 40°C maximum temperature.
** Moderate Dirt, Corrosion with 50°C maximum temperature. Average hours per month = 730
Symptom
Possible Cause
Solution
Fan will not run.
Blown fuse or breaker in disconnect switch.
To replace blown fuse, grasp center of fuse
securely and pull carefully outward to remove
fuse from the fuse holder. RISK OF FIRE.
Replace fuse only with equally rated fuse shown
on panel label.
Main power not turned ON.
Turn power ON at all disconnects ahead of
the unit.
Defective wiring or loose connection.
Follow wiring diagram and tighten any
loose connections.
Incorrect wire size.
See wire size charts for proper wire size and
change if needed.
Overload kicked out.
Check manual reset, push in to reset.
Defective motor.
Replace motor.
Defective magnetic contactor.
Check the magnetic contactor.
Fan runs for a short
period of time then
shuts off.
Undersize wiring.
Check to see that power supply wires are the
proper size, contact the local power company.
Low line voltage at the installation.
Call power company after making sure wire size
is correct.
Power failure.
Magnetic contactor malfunctioning.
Change magnetic contactor.
Defective start/stop button.
Replace necessary part.
Overload setting incorrect.
Adjust overload to proper setting.
Fan makes
ticking noise.
Fan blade hitting housing.
Stop fan and turn OFF power. Remove the fan
guard and check to see if fan blade is hitting the
housing. Adjust motor or fan wheel position to
obtain proper clearance.
Motor bearing bad.
Replace motor bearing.
Fan vibrates.
Fan not level.
Level fan.
Fan has dirt deposits on blade.
Clean blade.
Motor shaft is bent.
Replace motor.
Blade not mounted properly on shaft.
Mount blade properly on shaft.
Blade out of balance.
Replace or have blade rebalanced.
