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Troubleshooting
311772M 25
Troubleshooting
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 appliance does not
work, try another outlet.
Wrong size generator Use a 3500 watt or larger generator.
Refer to Generator Requirements,
page 6.
Breaker tripped Reset breaker.
Pump won’t pump material Air lock Open air valve on gun.
Selector switch in wrong position Move selector switch to correct posi-
tion for application.
Mix too thick Add water to thin material. Use Mate-
rial Thickness Gauge.
Loose fittings Check and retighten all fittings.
Plugged gun Relieve Pressure, page 6. 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 valve closed Open gun air valve.
Low voltage Check extension cord length and
gauge. Replace if different than rec-
ommended. Refer to Grounding and
Electrical Requirements, page 6.
Gun needle plugged Clean needle and retry.
Worn compressor Replace compressor. Contact a qual-
ified Graco Service Center.
Lines not connected Check all quick disconnect connec-
tions to gun and hoses.
Damaged hose Replace hose.