Table of Contents
Advertisement
Problem
Basic Electrical
See wiring diagram, page
27
311990F
What To Check
(If check is OK, go to next check)
1. Electric supply. ON/OFF switch in
OFF position. Meter must read
100-130 Vac.
2. Extension cord. Check extension
cord continuity with volt meter.
3. Sprayer power supply cord.
Inspect for damage such as bro-
ken insulation or wires.
4. Fuse. Check replaceable fuse on
control board (next to ON/OFF
switch).
5. Motor leads are securely fas-
tened and properly connected to
control board.
6. Motor thermal switch. Yellow
motor leads must have continuity
through thermal switch.
7. Brush cap missing or loose brush
lead connections.
8. Brush length which must be
greater than 1/4 in. (6mm).
NOTE: Brushes do not wear at
the same rate on both sides of
motor. Check both brushes.
9. Motor armature commutator for
burn spots, gouges and extreme
roughness.
10. Motor armature for shorts using
armature tester (growler) or per-
form spin test, page 15.
11. Pressure control not plugged in
to control board.
What To Do
(When check is not OK, refer to this column)
Turn ON/OFF switch to ON position. Reset
building circuit breaker, replace building fuses.
Try another outlet.
Replace extension cord.
Replace power supply cord. See page 25,
Power Cord Replacement.
Replace fuse after completing motor inspec-
tion. See page 20, Fuse Replacement.
Replace loose terminals; crimp to leads. Be
sure terminals are firmly connected.
Clean circuit board terminals. Securely recon-
nect leads.
Replace motor. See page 26, Motor Replace-
ment.
Install brush cap or replace brushes if leads
are damaged. See page 17, Motor Brush
Replacement.
Replace brushes. See page 17, Motor Brush
Replacement.
Remove motor and have motor shop resurface
commutator if possible. See page 26, Motor
Replacement.
Replace motor. See page 26, Motor Replace-
ment.
Insert pressure control connector into control
board.
Troubleshooting
9
Advertisement
Table of Contents
