Electrical - Graco 18H269 Operation Manual

Electrical

Symptom: Sprayer does not run, stops
running, or will not shut off.
Problem
Sprayer does not run at all.
Sprayer will not shut off after
reaching or exceeding
maximum pressure.
Basic electrical problems
3A9031D
1.
2.
3.
4.
What to Check
Check battery charge.
Check pressure control
connections.
Check pressure control.
Check motor leads.
Check all wiring harnesses for
pinched or severed wires
(power switch, motor,
pressure control).
Check pressure control.
Motor leads are securely
fastened and properly mated
Troubleshooting
Perform Pressure Relief Procedure,
page 10.
Install fully charged battery, see Battery
Installation and Removal, page 14.
Turn the ON/OFF switch OFF, wait 30
seconds and then turn power back ON
again (this ensures sprayer is in normal
run mode).
Turn pressure control knob clockwise
1/2 turn.
How to check
Press charge level indicator on
battery. Charge battery or
install a new battery, if
needed.
Make certain connector is
clean and firmly connected.
Connect known good pressure
control. If the motor runs,
replace pressure control.
Make certain terminals are
clean and firmly connected.
Repair wires or bring to Graco
certified repair shop.
Disconnect pressure control, if
sprayer still runs, replace
control board. If the sprayer
stops, replace pressure
control.
Replace loose terminals; crimp
to leads. Be sure terminal are
firmly connected.
Clean circuit board terminals.
Securely reconnect leads.
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