309412 5
Troubleshooting
Relieve pressure;page 4.
PROBLEM CAUSE SOLUTION
E=XXis d isplayed Faultcondition exists Determinefault correction from table,page 14.
Enginewon’t start Engine switch is OFF Turnengine switch ON
Engineis out of gas Refillgas tank. Honda Engines Owner’s Manual.
Engineoil level is low Tryto start engine. Replenish oil, ifnecessary.
HondaEngines Owner’s Manual.
Sparkplug cable is disconnected or damaged Connectspark plug cable or replace spark
plug
Coldengine Usechoke
Fuelshutoff lever is OFF Move lever to ON position
Oilis seeping into combustion chamber Removespark plug. Pull starter 3 to 4 times.
Cleanor replace spark plug. Start engine.
Keepsprayer upright to avoid oil seepage.
Falsetripping of Watch-
Dogsystem. EMPTY is
displayed.Pump does
notrun.
Operatingconditions out of WatchDog parameters Turnpressure down. Contact Graco Technical
Assistanceto adjust WatchDog parameters.
Operatewithout WatchDog active; Manual
309408.
Lowpump output. SeeTroubleshooting Table, PumpOutlet Low,
page6.
Engineoperates, but
displacementpump
doesnot operate
Errorcode displayed? Determinefault correction from table,page 14.
Pumpswitch is OFF TurnpumpswitchON.
Pressuresetting is too low Turnpressure adjusting knob clockwise to
increasepressure.
Fluidfilter (318) is dirty Cleanfilter. Page 20.
Tipor tip filter is clogged Clean tip or tipfilter. Manual 309091.
Displacementpump piston rod is stuck due to dried
paint
Repairpump. Manual 309277.
Connectingrod is worn or damaged Replaceconnecting rod. Page 15.
Drivehousing is worn or damaged Replacedrive housing. Page 9.
Electricalpower is not energizing clutch field Checkwiring connections. Page 11.
Referencepressure control repair.Page 13.
Referencewiring diagram. Page 21.
Withpump switch ON and pressure turned to
MAXIMUM,use a test light to check for power
betweenclutch test points on control board.
Remove7 --pinconnector from controlboard
andmeasure resistance across clutch coil. At
70_F,the resistance must be between 1.7
±0.2Ω;if not, replace pinion housing.
Havepressure control checked by authorized
Gracodealer.