Full Product Manual

Troubleshooting
3A3258J 21
Troubleshooting
1. Follow Pressure Relief Procedure,
page 9, 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 appliance
does not work, try another outlet.
Wrong size generator Use a 3500 watt or larger gener-
ator. Refer to Generator Require-
ments, page 10.
Circuit breaker tripped Reset breaker.
Pump won’t pump material Air lock Open air 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 Proce-
dure, page 9. 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 flow turned down Turn up material flow control.
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
recommended. Refer to Ground-
ing and Electrical Requirements,
page 9.
Gun needle plugged Clean needle and retry.
Worn compressor Replace compressor. Contact a
qualified Graco Service Center.
Lines not connected Check all quick disconnect con-
nections to gun and hoses.
Damaged hose. Replace hose.