Troubleshooting
3A3265B 21
Troubleshooting
1. Follow Pressure Relief Procedure,
page 8, before checking or repairing.
2. Check all possible problems and causes
before disassembling the unit.
Problem Cause Solution
Sprayer won’t run Power switch not on Turn switch on.
No power at wall outlet Check outlet by plugging in
another appliance. If appli-
ance does not work, try
another outlet.
Wrong size generator Use a 7500 watt or larger gen-
erator. Refer to Generator
Requirements, page 8.
Circuit breaker tripped Reset breaker.
Pump won’t pump material Air lock
Open air
control valve on gun.
Mix too thick Add water to thin material. Use
Material Thickness Gauge.
Loose fittings Check and retighten all fittings.
Plugged gun Perform Pressure Relief Pro-
cedure, page 8. Remove gun
from hose. Clean gun.
Pump hose worn out Replace hose. Recommended
hose replacement - once every
year.
Pump cold Move pump to warm room and
allow it to warm up or run hot
water through sprayer.
Material runs out of bottom of
sprayer
Pump hose worn out Replace hose.
Loose fittings Check and retighten all fittings.
No air from compressor
Gun air
control valve closed Open gun air control valve.
Low voltage Check extension cord length
and gauge. Replace if differ-
ent than recommended. Refer
to Grounding and Electrical
Requirements, page 8.
Gun needle plugged Clean needle and retry.
Worn compressor
Replace compressor. Contact a
qualified Graco Service Center.
Loose belt Tighten belt by adjusting com-
pressor
Broken belt Replace belt
Lines not connected Check all quick disconnect
connections to gun and hoses.
Damaged hose. Replace hose.
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