Troubleshooting - Graco 309412F Repair Instructions

Relieve pressure; page 4.
PROBLEM
E=XX is displayed
Engine won't start
False tripping of Watch-
Dog system. EMPTY is
displayed. Pump does
not run.
Engine operates, but
displacement pump
does not operate

Troubleshooting

CAUSE
Fault condition exists
Engine switch is OFF
Engine is out of gas
Engine oil level is low
Spark plug cable is disconnected or damaged
Cold engine
Fuel shutoff lever is OFF
Oil is seeping into combustion chamber
Operating conditions out of WatchDog parameters
Low pump output.
Error code displayed?
Pump switch is OFF
Pressure setting is too low
Fluid filter (318) is dirty
Tip or tip filter is clogged
Displacement pump piston rod is stuck due to dried
paint
Connecting rod is worn or damaged
Drive housing is worn or damaged
Electrical power is not energizing clutch field
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
Use choke
Move lever to ON position
Remove spark plug. Pull starter 3 to 4 times.
Clean or replace spark plug. Start engine.
Keep sprayer upright to avoid oil seepage.
Turn pressure down. Contact Graco Technical
Assistance to adjust WatchDog parameters.
Operate without WatchDog active; Manual
309408.
See Troubleshooting Table, Pump Outlet Low,
page 6.
Determine fault correction from table, page 14.
Turn pump switch ON.
Turn pressure adjusting knob clockwise to
increase pressure.
Clean filter. Page 20.
Clean tip or tip filter. Manual 309091.
Repair pump. Manual 309277.
Replace connecting rod. Page 15.
Replace drive housing. Page 9.
Check wiring connections. Page 11.
Reference pressure control repair. Page 13.
Reference wiring diagram. Page 21.
With pump switch ON and pressure turned to
MAXIMUM, use a test light to check for power
between 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 between 1.7
± 0.2Ω ; if not, replace pinion housing.
Have pressure control checked by authorized
Graco dealer.
309412 5