63
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 specied 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 Installation.
Damper control not adjusted
properly
Check airow in duct. Adjust damper control until proper
airow 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 sufcient power to
run all equipment.
Clean-air outlet
discharging dust
Filters not installed correctly See Filter Installation.
Filter damage, dents in the end
caps, gasket damage, or holes in
media
Replace lters as necessary. Use only genuine Donaldson
replacement parts. See Filter Installation.
Insucient airow
Fan rotation backwards Proper fan rotation is shown by arrow on fan housing. 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 ow control.
Filters need replacement Remove and replace using genuine Donaldson
replacement lters. See Filter Removal and Installation.