Graco RS Operation And Repair Manual page 28

Troubleshooting
Problem Cause
No solvent Not enough solvent pressure
No fluid in pressure pot
Output valve closed
Check valve stuck closed
Material check valve plugged
Solvent needle valve closed
Solvent check valve stuck closed
Solvent in cata- Solvent needle valve open
lyst/resin mix
Solvent check valve o-ring damaged or
missing
Solvent valve damaged
Resin in solvent line Solvent needle valve open
Solvent check valve o-ring damaged or
missing
Solvent valve damaged
AAC does not shut AAC needle o-ring damaged (internal mix)
off
Atomized catalyst air Atomized catalyst air needle o-ring dam-
does not shut off aged (external mix)
Air leakage Air lines not fully seated in push lock tube
fittings
Cutter assembly pivot tube o-ring damaged
or missing
AAC/Atomized catalyst external needle
o-ring damaged
Cutter air valve seat damaged
G hook o-ring missing
Cutter mount o-ring missing
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Solution
Increase solvent pressure to the recommended
range of 80-100 psi (550-700 kPa, 5.5-7.0 bar).
Refill pressure pot
Open output valve
Increase pressure in pressure pot
Clean and replace as needed
Open solvent needle valve
Ensure the solvent check valve opens freely
Close solvent needle valve
Inspect and replace if necessary
Inspect and replace if necessary
Close solvent needle valve
Inspect and replace if necessary
Inspect and replace if necessary
Inspect and replace if necessary
Inspect and replace if necessary
Ensure air lines are fully seated in fitting
Inspect and replace if necessary
Inspect and replace if necessary
Inspect and replace if necessary
Inspect and replace if necessary
Inspect and replace if necessary
3A0232ZAA