Hitachi GMAX II 3900 - Manual (Page 6)

Troubleshooting
6 310893L
Troubleshooting
Problem Cause Solution
E=XX is displayed Fault condition exists Determine fault correction from table, page 15
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 or 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 15
Pump switch is OFF Turn pump switch ON
Pressure setting too low Turn pressure adjusting knob clockwise to
increase pressure.
Fluid filter (56) is dirty Clean filter. Page 28.
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 Digital Display Messages. Page 15.
Reference wiring diagram. Page 29.
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 assembly is worn or damaged Repair or replace pinion assembly. Page10.