Graco 278680, Instructions Manual, Page: 11 / 28

Troubleshooting
332257A 11
Basic Electrical Problems Electric supply. Meter must read:
• 210-255 VAC for 220-240V
models
Reset building circuit breaker.
Replace building fuse. Try another
outlet.
Extension cord. Check extension
cord continuity with volt meter. Replace extension cord.
Sprayer power supply cord. Inspect
for damage such as insulation or
wires. Replace power supply cord, page 24.
Motor leads are securely fastened
and properly mated. Replace loose terminals; crimp to
leads. Be sure terminals are firmly
connected.
Clean circuit board terminals.
Securely reconnect leads.
NOTE: For the following electric
problems, refer to Wiring Diagram ,
page 24, to identify Test Points (TP).
Power supply cord. Connect volt
meter between L1 and L2. Plug in
sprayer. Meter must read:
• 210-255 VAC for 220-240V
models
Unplug sprayer.
Replace power supply cord, page 24.
ON/OFF Switch. Connect volt meter
between L1 and L2 terminal on
ON/OFF switch. Plug in sprayer and
turn ON. Meter must read:
• 210-255 VAC for 220-240V
models
Replace ON/OFF switch. See page
19.
All terminals for damage or loose fit. Replace damaged terminals and
reconnect securely.
Type of Problem
What to Check
(if check is OK, go to next)
What to Do
(When check is not OK, refer to this
column)