Downflo Workstation, DWST 4-1 to 6-4
8
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.
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 damaged or worn
Replace filters as necessary. Use only genuine Donaldson
replacement parts. See Filter Installation.
Access cover(s) loose
Tighten access doors securely. 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 Start-Up/Commissioning.
Fan exhaust area restricted
Check fan exhaust area for obstructions. Remove material
or debris. Adjust damper flow control.
High filter Delta P
New filters needed
Remove and replace using genuine Donaldson
replacement filters. See Filter Replacement.
Lack of compressed air
See Rating and Specification Information for compressed
air supply requirements.
Pulse cleaning not energized
Use a voltmeter to check the solenoid valves in the control
panel. Check pneumatic lines for kinks or obstructions.
Solid-State timer out of adjustment
See Solid-State Timer and Solid-State Timer Wiring
Diagram.
Troubleshooting
