Troubleshooting
6
311046J
Troubleshooting
Problem
Cause
Solution
E=XX is displayed
Fault condition exists
Determine fault correction from table, page 14
Engine will not start
Engine switch is OFF
Turn engine switch ON
Engine is out of gasoline
Refill gas tank. Honda Engines Owner's Man-
ual.
Engine oil level is low
Try to start engine. Replenish oil, if necessary.
Honda Engines Owner's Manual.
Spark plug is disconnected of damaged Connect spark plug cable or replace spark plug
Cold engine
Use choke
Fuel shutoff lever is OFF
Move lever to ON position
Oil is seeping into combustion chamber Remove spark plug. Pull starter 3 to 4 times.
Clean or replace spark plug. Start engine.
Keep sprayer upright to avoid oil seepage
False tripping of WatchDog system.
EMPTY is displayed. Pump does not
run.
Operating conditions out of WatchDog
parameters
Pump output is low, page 7.
Turn pressure down. Contact Graco Technical
Assistance to adjust WatchDog parameters.
Operate without WatchDog active; Manual
310892.
Engine operates, but displacement
pump does not operate
Error code displayed
Reference Pressure Control repair, page 14
Pump switch is OFF
Turn pump switch ON
Pressure setting too low
Turn pressure adjusting knob clockwise to
increase pressure.
Fluid filter (29) is dirty
Clean filter. Page 22.
Tip or tip filter is clogged
Clean tip or tip filter. Manual 309639.
Displacement pump piston rod is stuck
due to dried paint
Repair pump. Manual 310894.
Connecting rod is worn or damaged
Replace connecting rod. Page 8.
Drive housing is worn or damaged
Replace drive housing. Page 9.
Electrical power is not energizing clutch
field
Check wiring connections. Page 12.
Reference pressure control repair. Page 14.
Reference wiring diagram. Page 23.
With pump switch ON and pressure turned to MAXI-
MUM, use a test light to check for power between clutch
test points on control board.
Remove clutch wires from control board and
measure resistance across clutch coil. At 70° F,
the resistance must be between 1.2 +0.2
Ω
; if
not, replace pinion housing.
Have pressure control checked by authorized Graco
dealer
Clutch is worn, damaged, or incorrectly
positioned
Adjust or replace clutch. Page 10.
pinion housing is worn or damaged
Repair or replace pinion housing. Page10.
