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disconnecting power when installing or servicing. If power disconnect
is not visible, utilize OSHA Lock out/Tag out procedure.
Failure to do so may result in fatal electrical shock.
Employ proper lock-
out/tag
maintenance.
Symptom
Possible Cause(s)
Excessive noise
Dry motor bearings
Loose propeller
Bent or damaged
propeller
Loose guard assembly or
motor fasteners.
Fan inoperative
Blown fuse or open
circuit breaker
Defective motor
Switch in OFF
Blocked intake or
exhaust opening
TROUBLESHOOTING
disconnecting power when installing or servicing. If power disconnect
is not visible, utilize OSHA Lock out/Tag out procedure.
Failure to do so may result in fatal electrical shock.
out/tag
-out procedures when perform
ing
Possible Cause(s)
Solution
Dry motor bearings
Re-
lubricate motor
bearings as per
instructions
or replace motor.
Loose propeller
Tighten set screws on
propeller hub.
Bent or damaged
propeller
Replace propeller
Loose guard assembly or
motor fasteners.
Tighten as required to 15
20 lbs. per inch.
Blown fuse or open
circuit breaker
Replace fuse or reset
circuit breaker
Defective motor
Replace motor
Switch in OFF
position Turn switch ON
Blocked intake or
exhaust opening
Clear intake and exhaust
openings of any
obstructions.
Clean motor, guard,
propeller, and
shutter
assembly. Increase the
opening of the fresh air
intake.
TROUBLESHOOTING
11
disconnecting power when installing or servicing. If power disconnect
ing
Solution
lubricate motor
instructions
or replace motor.
Tighten set screws on
Replace propeller
Tighten as required to 15
-
Replace fuse or reset
Clear intake and exhaust
Clean motor, guard,
shutter
assembly. Increase the
opening of the fresh air
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