Troubleshooting
309863A
13
Troubleshooting
Pressure Relief, page 5
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 5
Too many items on same circuit
Unplug other items from circuit
Extension cord too long or wrong
gauge
Use a different extension cord. Refer
to Grounding and Electric Require-
ments, page 5
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 5. Remove
gun from hose. Clean gun.
Pump hose worn out
Replace hose. Recommended hose
replacement - after every 40 hours of
operation.
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 5.
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