288841Control Board; Airless Motor Will Not Start - Graco FinishPro 390 Repair Electrical Manual

FinishPro 390
288841 Control Board
Airless Motor will not run
See pages 12 for the steps and illustrations.
See step 1.
Do you have
NO
over 100 AC
volts?
YES
See step 2. Do
you have over NO
100 AC volts?
YES
See step 3.
NO
Is there over
100 DC volts?
YES
See Motor Test
See ON/OFF
Switch Test
.
No
Is the fuse open?
YES
Before replacing
the fuse check
the motor for a short.
See step 4.
Is there
continuity
NO
through the
thermistor
wires?
YES
See step 5
Does the
No
motor run?
YES
Replace
Pressure Switch
Replace Control Board.
If motor is hot, let
cool and retest, if
step 4 still shows an
open replace motor.
The motor has a
defective
thermistor switch.
Replace Control Board.
12