14
Donaldson Company, Inc.
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.
Damaged motor
Replace damaged motor.
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 Replacement.
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.
Clean-air outlet
discharging dust
Filters not installed correctly
See Filter Installation.
Filter(s) damaged or worn
Replace filters as necessary. Use only genuine Donaldson
replacement parts. See Filter Replacement.
Insufficient airflow
Fan rotation backwards
Proper fan rotation is clockwise when viewed from the
motor side or counterclockwise when viewed through the
inlet cone. 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.
Filters need replacement
Remove and replace using genuine Donaldson
replacement filters. See Filter Replacement.
Dust storage area overfilled or
plugged
Clean out dust storage area. See Dust Disposal.
Cleaning arm failure
Check for adequate clearance between nozzles and
tubesheet for free rotation. Check drive chain for proper
tension.
Troubleshooting
