Graco FinishPro 390 Repair Electrical Manual

See page 20 for the steps and illustrations.
See ON/OFF
Switch Test.
FinishPro 395
288840 Control Board
Airless Motor will not run
NO
Remove the
control box
cover. Turn
the sprayer
on. Is the red
light flashing
?
If motor is hot let
cool and retest, if
step 3 still shows an
open replace motor.
The motor has a
defective
thermistor switch.
YES
NO
See step 3.
Is there
continuity
through the
thermistor
wires?
See step 4.
Does the motor run?
See motor
test section.
See Error
Codes.
YES
NO
See step 1.
Do you have
over 100 AC
volts?
YES
See step 2.
Is there over
100 DC volts?
YES
YES
NO
Replace Potentiometer.
Pressure Switch
Connect a test
transducer to
the board.
Does the
motor run
Replace the
transducer
.
Replace the
Co
ntrol
Board
Yes
N
o
NO
Have the steps been
followed in the
(ON/Off Switch Test) section?
YES
See ON/OFF
Switch Test.
NO
21

Graco FinishPro 390 Specifications

General

Brand	Graco
Model	FinishPro 390
Category	Paint Sprayer
Language	English