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Troubleshooting
24 332916C
Troubleshooting
Mechanical/Fluid Flow
Perform Pressure Relief Procedure; page 13.
TYPE OF PROBLEM
WHAT TO CHECK
If check is OK, go to next check
WHAT TO DO
When check is not OK, refer to this column
For units with display:
CODE XX is displayed.
For units with no display:
ProGuard status light is
blinking or the light is off
and there is power to the
sprayer.
Fault condition exists Determine fault correction from table,
page 27.
Pump output is low Spray tip worn Follow Pressure Relief Procedure on page
13, then replace tip. See your separate gun or
tip manual.
Spray tip clogged Relieve pressure. Check and clean spray tip.
Paint supply Refill and reprime pump.
Intake strainer clogged Remove and clean, then reinstall
Intake valve ball and piston ball are
not seating properly
Remove intake valve and clean. Check balls
and seats for nicks; replace if necessary; see
pump manual. Strain paint before using to
remove particles that could clog pump.
Fluid filter, tip filter, or tip is clogged
or dirty.
Clean filter; see operation manual.
Prime valve leaking Relieve pressure. Repair prime valve.
Verify pump does not continue to
stroke when gun trigger is released.
(Prime valve not leaking.)
Service pump; see pump manual.
Leaking around throat packing nut
which may indicate worn or damaged
packings.
Replace packings; see pump manual. Also
check piston valve seat for hardened paint or
nicks and replace if necessary. Tighten pack-
ing nut/wet-cup.