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Relieve pressure; page 6.
PROBLEM
E=XX is displayed
Engine won't start
False tripping of WatchDog
system. EMPTY is dis-
played. Pump does not run.
Engine operates, but dis-
placement pump doesn't
placement pump doesn't
Troubleshooting
CAUSE
Fault condition exists
Engine switch is OFF
Engine is out of gas
Engine oil level low
Spark plug cable disconnected or
spark plug damaged
Oil seepage into combustion
chamber
Operating conditions out of WatchDog
parameters
Low pump output; page 8.
Pressure control switch turned OFF
Pressure setting too low
Displacement pump outlet filter dirty
Tip or tip filter clogged
Broken drive belt
Displacement pump rod seized by
dry paint
Connecting rod worn or damaged
Drive housing worn or damaged
Electrical power is not energizing clutch field
Clutch is worn, damaged, or incorrectly
positioned
Pinion assembly is worn or damaged
SOLUTION
Determine fault correction from table, page 14.
Turn engine switch on.
Refill gas tank. Honda Engines Owner's Manual.
Try to start engine. Replenish oil, if necessary.
Honda Engines Owner's Manual.
Connect spark plug cable or replace spark plug.
Remove spark plug. Pull starter rope 3 or 4 times.
Clean or replace spark plug. Try to start engine.
Keep sprayer upright to avoid oil seepage.
Turn pressure down. Contact Graco Technical Ser-
vice to adjust WatchDog parameters.
Operate without WatchDog active; Manual 309410.
Turn on.
Increase pressure.
Clean filter.
Clean tip or tip filter.
Replace belt.
Service pump. See page 16.
Replace. See page 9.
Replace. See page 10.
Check wiring connections. Page 23.
Reference pressure control repair. Page 14.
Reference wiring diagram. Page 23.
With pump switch ON and pressure turned to
MAXIMUM, use a test light to check for power be-
tween clutch test points on control board.
Remove 7–pin connector from control board and
measure resistance across clutch coil. At 70_ F,
±
the resistance must be 1.7
pinion housing.
Have pressure control checked by authorized Gra-
co dealer.
Replace clutch. Page 11.
Repair or replace pinion assembly. Page 11.
0.2Ω; if not, replace
7
309411
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