Graco 24M623 Manual page 15

Problem
Basic electrical problems.
3A2361B
Cause
Motor overheated.
Electrical outlet is damaged.
Control board leads are improperly
fastened or improperly mated.
Motor brushes are worn.
Motor armature commutator
damaged.
Control board damaged.
CAUTION: Do not perform control
board diagnostics until you have
determined the armature is good.
A damaged armature can burn out
a good control board.
Solution
Allow motor to cool for 45 minutes. Retry.
Reset building circuit breaker or replace fuse. Try
another outlet.
Check electric supply with volt meter. Meter must read
220 to 240V AC. If voltage is too high, do not plug
sprayer in until outlet is corrected.
Replace any loose terminals. Make sure all leads and
harnesses are firmly connected.
Check pressure control harness connection on front
side of drive housing.
Clean control board terminals. Securely reconnect
leads.
Check length of BOTH brushes (brushes do not wear
evenly on both sides of the motor). Brush length must
be 0.25 in. (6.4mm). If brushes are worn replace motor
using Motor Kit, page 17.
Check for burn spots, gouges and extreme roughness.
Replace motor using Motor Kit, page 17.
See Control Board Diagnostics, page 18. Replace
control board if damaged using Control Board Kit,
page 17.
Troubleshooting
15