Troubleshooting
3A9031A 33
Electrical
Symptom: Sprayer does not run, stops
running, or will not shut off.
1. Perform Pressure Relief Procedure,
page 10.
2. Install fully charged battery, see Battery
Installation and Removal, page 14.
3. Turn the ON/OFF switch OFF, wait 30
seconds and then turn power back ON
again (this ensures sprayer is in normal
run mode).
4. Turn pressure control knob clockwise
1/2 turn.
Problem What to Check How to check
Sprayer does not run at all. Check battery charge. Press charge level indicator on
battery. Charge battery or
install a new battery, if
needed.
Check pressure control
connections.
Make certain connector is
clean and firmly connected.
Check pressure control. Connect known good pressure
control. If the motor runs,
replace pressure control.
Check motor leads. Make certain terminals are
clean and firmly connected.
Check all wiring harnesses for
pinched or severed wires
(power switch, motor,
pressure control).
Repair wires or bring to Graco
certified repair shop.
Sprayer will not shut off after
reaching or exceeding
maximum pressure.
Check pressure control. Disconnect pressure control, if
sprayer still runs, replace
control board. If the sprayer
stops, replace pressure
control.
Basic electrical problems Motor leads are securely
fastened and properly mated
Replace loose terminals; crimp
to leads. Be sure terminal are
firmly connected.
Clean circuit board terminals.
Securely reconnect leads.
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