WSO 10, 15, and 20
33
Troubleshooting
Problem
Probable Cause
Remedy
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.
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.
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 heater
elements installed
Check for proper heater elements and replace if
necessary.
Access doors are open or not
closed tight
Close and tighten access doors.
Electrical circuit overload
Check that the power supply circuit has sufficient
power to run all equipment.
Clean-air outlet
discharging oil mist
Filter cartridges not installed
correctly
See Filter Service section.
Filter cartridge damage, dents in
the end caps, gasket damage or
holes in pleated media
Replace filters as necessary. Use only genuine
Donaldson replacement parts. See Filter Service
section.
Inlet discharging
volumes of oil
Plugged P-trap
Clean P-trap. See P-Trap Service Section.
Plugged or full drain collection
container
Remove and clean or empty the drain collection
container.
Summary of Contents for WSO 10
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