11
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.
Overload relay tripped
Reset. Check amp draw on motor leads.
Defective overload heater or
overload assembly
Replace as necessary.
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.
Electrical circuit overload
Check that the power supply circuit has sufficient power to
run all equipment.
Clean-air outlet
discharging oil mist
Filters not installed correctly
See Filter Installation.
Filter damage, dents in the end
caps, gasket damage, or holes in
media
Replace filters as necessary. Use only genuine Donaldson
replacement parts. See Filter Installation.
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.
Fan exhaust area restricted
Check fan exhaust area for obstructions. Remove material
or debris.
First Stage filter plugged
Remove and clean or replace.
Primary filter needs replacement
Replace filters as necessary. Use only genuine Donaldson
replacement parts. See Filter Installation.
Plugged HEPA filter
Replace filters as necessary. Use only genuine Donaldson
replacement parts. See Optional Equipment.
