User's Manual

Troubleshooting
10 311021U
Fluid delivery is low Pressure setting too low
Displacement pump outlet filter (if used)
is dirty or clogged
Intake line to pump inlet is not tight
Hydraulic motor is worn or damaged
Large pressure drop in fluid hose
Increase pressure. See manual 311018
Clean filter
Tighten
Bring sprayer to Graco distributor for repair
Use larger diameter for shorter hose
The sprayer overheats Paint buildup on hydraulic components Clean
Oil level is low Fill with oil, page 7.
Excessive hydraulic pump noise Low hydraulic fluid level Shut off sprayer. Add fluid*, page 7.
Gallon counter not working Broken or disconnected wire Check wires and connections. Replace
broken wires.
Bad sensor Replace sensor
Missing or damaged magnet Replace magnet. Locate in correct spot.
Sprayer operates, but display does not Bad connection between control board
and display
Remove display and reconnect
Display damaged Replace display
Loose cables Connect cables to back of control board
Control board LED not flashing Replace control board
Distance counter not operating properly Trigger sensor not set correctly See “Spray icon does not show on display
when fluid is sprayed”
Bad wiring connections Check connector, and reconnect
Distance sensor not spaced correctly
from gear
Adjust space between sensor and gear to
0.50 -/+ .020 in. (page 15).
Distance and gear not aligned Remove tire, and press in or pull out gear to
align sensor and gear.
Gear teeth missing or damaged Replace distance gear/wheel
Wire cracked or broken Replace sensor
Mils not calculating Distance sensor See “Distance counter not operating
properly”
Trigger sensor See “Spray icon does not show on display
when fluid is sprayed”
Gallon counter See “Gallon counter not working”
Bad or damaged control board Replace control board
Fluid spray starts after spray icon is
shown on display
Interrupter (164) is improperly positioned Turn screw counterclockwise until spray icon
synchronizes with fluid spray.
Fluid spray starts before spray icon is
shown on display
Interrupter (164) is properly positioned Turn screw clockwise until spray icon is
synchronized with fluid spray
Problem Cause Solution