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Donaldson Company, Inc.
Troubleshooting
Problem Probable Cause Remedy
Fan blower and motor do
not start
Improper motor wire size Rewire using the correct wire gauge as specified by
national and local codes.
Not wired correctly Check and correct motor wiring for supply voltage.
See motor manufacturer's wiring diagram. Follow
wiring diagram and the National Electric Code.
Collector not wired for available
voltage
Correct wiring for proper supply voltage.
Input circuit down Check power supply to motor circuit on all leads.
Electrical supply circuit down Check power supply circuit for proper voltage.
Check for fuse or circuit breaker fault. Replace as
necessary.
Fan blower and motor
start, but do not stay
running
Incorrect motor starter installed Check for proper motor starter and replace if
necessary.
Access doors are open or not
closed tight
Close and tighten access doors. See Filter
Installation.
Hopper discharge open Check that dust container is installed and properly
sealed.
Damper control not adjusted
properly
Check airflow in duct. Adjust damper control until
proper airflow is achieved and the blower motor’s
amp draw is within the manufacturer’s rated amps.
Electrical circuit overload Check that the power supply circuit has sufficient
power to run all equipment.
Inlet too large for collector
rating
Contact installer of dust collection equipment.
Insufficient airflow
Fan rotation backwards Proper fan rotation is clockwise from the top of the
collector. The fan can be viewed through the back of
the motor. See Preliminary Start-Up Check.
Access doors open or not
closed tight
Check that all access doors are in place and
secured. Check that the hopper discharge opening is
sealed and that dust container is installed correctly.
Fan exhaust area restricted Check fan exhaust area for obstructions. Remove
material or debris. Adjust damper flow control.
Dust storage area overfilled or
plugged
Clean out dust storage area. See Dust Disposal.
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