Troubleshooting - Graco 257369 Repair Manual

Troubleshooting

Troubleshooting
Problem
E=XX is displayed
Engine will not start
Engine operates, but displace-
ment pump does not operate
10
Cause
Fault condition exists
Engine switch is OFF
Engine is out of gasoline
Engine oil level is low
Spark plug is disconnected or damaged Connect spark plug cable or replace spark plug
Cold engine
Fuel shutoff lever is OFF
Oil is seeping into combustion chamber Remove spark plug. Pull starter 3 to 4 times. Clean
Error code displayed
Applicator switch is OFF
(Base Coat Only)
Pump setting is OFF
Tip or tip filter is clogged
Displacement pump piston rod is stuck
due to dried paint or texture
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
Base Coat Pump: Applicator switch on
material hose and/or Prime Switch on
Pressure Control are damaged.
Top Coat Pump: Pump is not correctly
aligned to pump sensor or sensor is
damaged.
Solution
Determine fault correction from Digital Display Mes-
sages table, see manual 313888.
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.
Use choke
Move lever to ON position
or replace spark plug. Start engine. Keep sprayer
upright to avoid oil seepage
Reference Pressure Control repair, page 20.
Turn applicator switch ON
Turn pressure adjusting knob clockwise to increase
pressure.
Clean tip or tip filter, see manual 313537/313603.
Repair pump, see manual 310894 or page 24.
Replace connecting rod. Page 12.
Replace drive housing. Page 13.
Check wiring connections. Page 26.
Reference Digital Display Messages, manual
313888.
Reference Wiring Diagram. Page 26.
With applicator switch ON and pressure turned to
MAXIMUM, use a test light to check for power
between clutch test points on control board.
Remove clutch wires from control board and mea-
sure resistance across clutch coil. At 70° F (21° C),
the resistance must be between 1.2 +0.2Ω; if not,
replace pinion housing.
Have pressure control checked by authorized Graco
dealer
Adjust or replace clutch. Page 18.
Repair or replace pinion assembly. Page 14.
See page 24.
Rotate pump to align transducer port toward back of
sprayer. Replace damaged pump sensor.
313889E