INTRODUCTION
Congratulations on your selection of a new Vane Axial Fan from Schaefer Ventilation. Our goal is to provide you with
the very best in high performance air ventilators. Reading this Owner’s Manual will help you achieve the maximum
benefit from your portable air ventilator. If you do not understand any portion of this Manual, please contact
Schaefer, or your authorized Schaefer dealer for proper assistance prior to operating this Fan.
Do not allow anyone to operate the Vane Axial Fan without first reading the Operator’s Manual and becoming familiar
with its operation. Schaefer has endeavored to provide you with the finest equipment available for providing air for
portable ventilation purposes. The possibility does exist, however, that the Vane Axial Fan can be subjected to
applications not intended by Schaefer.
Misuse and/or misapplication of the Vane Axial Fan can lead to the
possibility of serious damage, injury or even death.
Anyone operating the Vane Axial Fan should refer to current
OSHA job safety and health rules and regulations pertaining to the construction industry, with a particular emphasis
on 29 CFR 1910, which contains rules governing Permit-Required Confined Spaces for General Industry.
Record the Vane Axial Fan model and serial number in the space provided below.
Model No.____________________________________Serial No.________________________________________
Date Purchased_______________________________________________________________________________
All specifications are general in nature and are not intended for specific application purposes. Schaefer accepts no
responsibility for variations which may be evident in actual products, specifications, pictures and descriptions
contained in this publication.
GENERAL TROUBLESHOOTING GUIDE
PROBLEM
CAUSE
SOLUTION
MOTOR TROUBLESHOOTING GUIDE
REASON
LOW TORQUE
LOW SPEED
WON’T RUN
RUNS HOT
RUNS GOOD,
THEN SLOWS
Unit will not run
Unit runs but fan makes
loud scraping noise
Unit runs but vibrates
excessively
Unit runs but fan does
not turn
Unit runs but does not
develop full power
• No air supply to unit
• Faulty air supply line
• Connect air supply
• Perform maintenance and
check line to air supply
• Unit has been severely jolted
causing fan to rub against housing
• Unit has been severely jolted
causing housing to deform
• Remove motor and replace
damaged motor mounts
• Perform maintenance and
check line to air supply
• Severe jolt has bent motor shaft
causing unit to be out of balance
• Fan blade is damaged
• Dirt build-up on one side of fan blade
• Remove and replace motor
Replace fan blade as necessary
• Replace fan blade
• Clean fan blade
• Fan is jammed
• Housing has been damaged
and presses on the fan blade
• Low air supply pressure
• Low air supply cfm
• Excessive duct length
• Worn motor vanes
• Remove motor and replace damaged
motor mounts
• Replace fan blade if necessary
• Replace housing/unit as necessary
• Supply 100 psi air
• Increase size of compressor
and/or size of supply lines to
provide at least 71 cfm
• Reduce duct length to
recommended maximum
• Rebuild motor
Dirt, Foreign Material
Internal Rust
Misalignment
Insufficient Air Pressure
Too Small Air Line
Restricted Exhaust
Poor Lubrication
Jammed Machine
Compressor Too Small
Compressor Too Far
From Unit
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