Troubleshooting
32 3A9095C
Troubleshooting
Mechanical/Fluid Flow
1. Follow Pressure Relief Procedure,
page 14, before checking or repairing.
2. Check all possible problems and causes
before disassembling the unit.
To help prevent serious injury from
pressurized fluid, such as skin injection,
splashing fluid, and moving parts, follow
the Pressure Relief Procedure when you
stop spraying and before cleaning,
checking, or servicing the equipment.
Keep clear of moving parts during
troubleshooting procedures.
Problem
What to Check
If check is OK, go to next check
What to Do
When check is not OK, refer to
this column
Control board status light is blinking
or the light is off and there is power to
the sprayer
Fault condition exists. Determine fault correction from
Electrical, page 34.
Pump output is low Spray tip worn. Replace tip. See separate gun or tip
manual.
Spray tip clogged. Clear tip. See Clear Spray Tip Clog,
page 23.
Paint supply. Refill and reprime pump.
Intake strainer clogged. Remove and clean, then reinstall. If
problem persists, strain the paint.
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 or tip filter is clogged or
dirty.
Remove and clean, then reinstall.
Prime valve leaking. 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.
Tighten packing nut/wet-cup. Replace
packings. See pump manual. Also
check piston valve seat for hardened
paint or nicks and replace if
necessary.
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