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Troubleshooting
311365G 11
Troubleshooting
Mechanical/Fluid Flow
Relieve pressure; page 9.
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
E=XX is displayed 1. Fault condition exists 1. Determine fault correction from table,
page 13.
False tripping of WatchDog
system. EMPTY is dis-
played. Pump does not run.
1. Operating conditions out of
WatchDog parameters. Pump
output is low, see below.
1. Turn pressure down. Refer to operation
manual for adjusting. Operate without
WatchDog active; see operation manual.
Pump output is low 1. Spray tip worn 1. Follow Pressure Relief procedure Warn-
ing, then replace tip. See your separate
gun or tip manual.
2. Spray tip clogged 2. Relieve pressure. Check and clean spray
tip.
3. Paint supply 3. Refill and reprime pump.
4. Intake strainer clogged 4. Remove and clean, then reinstall
5. Intake valve ball and piston ball
are not seating properly
5. Remove intake valve and clean. Check
balls and seats for nicks; replace if neces-
sary; see pump manual 310643 or
310894. Strain paint before using to
remove particles that could clog pump.
6. Suction hose connections 6. Tighten any loose connections. Check for
missing or damaged seals.
7. Fluid filter, tip filter, or tip is
clogged or dirty.
7. Clean filter; see operation manual.
8. Prime valve leaking 8. Relieve pressure. Repair prime valve.
9. Verify pump does not continue to
stroke when gun trigger is
released. (Prime valve not leak-
ing.)
9. Service pump; see pump manual 310643
or 310894.
10. Leaking around throat packing
nut which may indicate worn or
damaged packings.
10. Replace packings; see pump manual. Also
check piston valve seat for hardened paint
or nicks and replace if necessary. Tighten
packing nut/wet-cup.
11. Pump rod damage 11. Repair pump. See pump manual 310643
or 310894.
12. Low stall pressure 12. Turn pressure knob fully clockwise. Make
sure pressure control knob is properly
installed to allow full clockwise position. If
problem persists, replace pressure trans-
ducer.
13. Piston packings are worn or
damaged
13. Replace packings; see pump manual
310643 or 310894.