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Troubleshooting
309674M 9
Troubleshooting
Type of Problem
What to Check
(if check is OK, go to next)
What to Do
(When check is not OK, refer to this
column)
Basic fluid pressure problems Pressure control knob setting. Motor
will not run if at minimum setting (fully
counter-clockwise).
Slowly increase pressure to see if
motor starts.
Spray tip or fluid filter may be
clogged.
Relieve pressure, page 7 and clear
clog, or clean filter; refer to separate
gun or tip instruction manual.
Basic Mechanical Problems Pump frozen or paint hardened in
pump.
Thaw sprayer if water or water-based
paint has frozen in sprayer. Place
sprayer in warm area to thaw. Do not
start sprayer until thawed completely.
If paint hardened (dried) in sprayer,
replace pump packings. See page
15, Displacement Pump Replace-
ment.
Displacement pump connecting rod
pin must be completely pushed into
connecting rod and retaining spring
must be firmly in groove of pump pin.
See page 15.
Push pin into place and secure with
spring retainer.
Motor. Remove drive housing assem-
bly. See page 17. Try to rotate fan by
hand.
Replace motor if fan won’t turn. See
page 19.
Motor control board. Board shuts
down and displays error code.
See Motor Control Board Diagnos-
tics, page 27.