Troubleshooting - Graco GMax 233700 Instruction & Repair Manual

Relieve pressure; page 5.
PROBLEM
E=XX is displayed
Engine won't start
False tripping of WatchDog
system. EMPTY is displayed.
Pump does not run.
Engine operates, but dis-
placement pump does not
operate
6 309409

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 param-
eters
Low pump output; page 7.
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
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
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.
Reference pressure control repair. Page 15.
Turn pump switch ON.
Turn pressure adjusting knob clockwise to
increase pressure.
Clean filter. Page 24.
Clean tip or tip filter. Manual 309091.
Repair pump. Manual 309277.
Replace connecting rod. Page 8.
Replace drive housing. Page 9.
Check wiring connections. Page 13.
Reference pressure control repair. Page 15.
Reference wiring diagram. Page 25.
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 1.2
± ±
0.2Ω (GMax 3900); 1.7 0.2Ω (GMax 5900);
if not, replace pinion housing.
Have pressure control checked by authorized
Graco dealer.
Replace clutch. Page 10.
Repair or replace pinion assembly. Page 10.