Troubleshooting

Troubleshooting

Relieve pressure; page 5.

PROBLEM

CAUSE

SOLUTION

 

 

 

E=XX is displayed

Fault condition exists

Determine fault correction from table, page 14.

 

 

 

Engine won’t start

Engine switch is OFF

Turn engine switch ON

 

 

 

 

Engine is out of gas

Refill gas tank. Honda Engines Owner’s Manual.

 

 

 

 

Engine oil level is low

Try to start engine. Replenish oil, if necessary.

 

 

Honda Engines Owner’s Manual.

 

 

 

 

Spark plug cable 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

Operating conditions out of WatchDog param-

Turn pressure down. Contact Graco Technical

system. EMPTY is displayed.

eters

Assistance to adjust WatchDog parameters.

Pump does not run.

Low pump output; page 7.

Operate without WatchDog active; Manual

 

309408.

 

 

 

 

 

Engine operates, but dis-

Error code displayed?

Reference pressure control repair. Page 15.

placement pump does not

 

 

operate

 

 

 

 

 

 

Pump switch is OFF

Turn pump switch ON.

 

 

 

 

Pressure setting is too low

Turn pressure adjusting knob clockwise to

 

 

increase pressure.

 

 

 

 

Fluid filter (318) is dirty

Clean filter. Page 24.

 

 

 

 

Tip or tip filter is clogged

Clean tip or tip filter. Manual 309091.

 

 

 

 

Displacement pump piston rod is stuck due to

Repair pump. Manual 309277.

 

dried paint

 

 

 

 

 

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 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.

 

 

 

 

Clutch is worn, damaged, or incorrectly

Replace clutch. Page 10.

 

positioned

 

 

 

 

 

Pinion assembly is worn or damaged

Repair or replace pinion assembly. Page 10.

 

 

 

6 309409

Page 6
Image 6
Graco Inc 3900, 233702, 233701, 233700, 309409E, 5900HD, 233717, 233716, 233707 Troubleshooting, Problem, Cause, Solution