35
Donaldson Company, Inc.
Troubleshooting
Problem
Probable Cause
Remedy
Power pack fan 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.
Unit 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.
Power pack fan 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 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.
Access cover(s) loose
Tighten access doors securely. See Filter Installation.
Insufficient airflow
Fan rotation backwards
Proper fan rotation is clockwise from the top of the
unit. 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.
Filters need replacement
Remove and replace using genuine Donaldson
replacement filters. See Filter Removal and
Installation.
Summary of Contents for DFO 2-4
Page 1: ...2...
Page 3: ......
Page 5: ......
Page 12: ......
Page 14: ......
Page 15: ......
Page 17: ...Downflo Oval DFO 2 4 and 3 6 14 This Page Intentionally Left Blank...
Page 19: ......
Page 21: ...Downflo Oval DFO 2 4 and 3 6 18 This Page Intentionally Left Blank...
Page 22: ......
Page 23: ......
Page 24: ......
Page 30: ......
Page 37: ......
Page 41: ...Downflo Oval DFO 2 4 and 3 6 38 Service Notes Date Service Performed Notes...
Page 42: ...39 Donaldson Company Inc Service Notes Date Service Performed Notes...
Page 43: ......