Graco 24F561, Repair Manual

Page: 10 / 40

Troubleshooting
10 3A1181B
Basic Electrical
See wiring diagram, page 28
1. Electric supply. ON/OFF switch in
OFF position. Meter must read
100-130 Vac; 210-260 Vac.
Turn ON/OFF switch to ON position.
Reset building circuit breaker,
replace building fuses. Try another
outlet.
2. Extension cord. Check extension
cord continuity with volt meter.
Replace extension cord.
3. Sprayer power supply cord.
Inspect for damage such as bro-
ken insulation or wires.
Replace power supply cord. See
Power Cord Replacement, page
26.
4. Fuse. Check replaceable fuse on
control board (next to ON/OFF
switch).
Replace fuse after completing
motor inspection. See
Fuse
Replacement, page 21 .
5. Motor leads are securely fas-
tened and properly connected to
control board.
Replace loose terminals; crimp to
leads. Be sure terminals are firmly
connected.
Clean circuit board terminals.
Securely reconnect leads.
6. Motor thermal switch. Yellow
motor leads must have continuity
through thermal switch.
Replace motor. See Motor
Replacement, page 27 .
7. Brush cap missing or loose brush
lead connections.
Install brush cap or replace brushes
if leads are damaged. See
Motor
Brush Replacement, page 18 .
8. Brush length which must be
greater than 1/4 in. (6 mm).
NOTE: Brushes do not wear at
the same rate on both sides of
motor. Check both brushes.
Replace brushes. See Motor
Brush Replacement, page 18 .
9. Motor armature commutator for
burn spots, gouges and extreme
roughness.
Remove motor and have motor
shop resurface commutator if possi-
ble. See
Motor Replacement,
page 27 .
10. Motor armature for shorts using
armature tester (growler) or per-
form
Spin Test , page 16 .
Replace motor. See Motor
Replacement, page 27 .
11. Pressure control not plugged in
to control board.
Insert pressure control connector
into control board.
Problem Cause Solution