Graco HydroShield WABH00 Instructions - Parts Manual page 72

Troubleshooting
Problem
Problem Problem
Spray
The system does not fill.
System is slow to fill.
72
Diagnosis
Diagnosis Diagnosis
The system thinks the gun is
triggered or electrostatics are
being requested. Either the PT
input or the ES input is active.
The Do Not Fill button
activated.
The system is in the wrong mode.
The Fill Start Delay setting is long.
The isolation valve does not travel
or engage.
Max Fill setting or Start Fill setting
is not accurate.
Inlet valve is off or stuck.
The isolation valve is blocked.
The check valve is blocked.
The Fill Start Delay setting is long.
Low incoming fluid pressure.
Material viscosity is high.
Solution
Solution Solution
Make sure that both the paint
trigger signal and the ES request
signal are inactive.
Deactivate the Do Not Fill button
is
on the Home Screen. See
Home Screen, page
Change to Spray mode.
Change the Fill Start Delay
value as described in
System Screen, page
Test the isolation valve and travel.
See Maintenance 3: Shuttle Valve
Resets and Test, page
Adjust Max Fill and Start Fill
settings, as described in
Screen 1: Pump Volume, page
Test valve using Main-
tenance screen 4. See
Maintenance 4: Fluid Valve
Resets and Test, page
Service the solenoid valve or
the fluid valve. See
Solenoid Valve, page
See Service the Isolation Valve,
page 91.
See Service the Isolation Valve,
page 91.
Change the Fill Start Delay
value as described in
System Screen, page
Check incoming fluid pressure
during the fill. Limit fluid pressure
drop in the supply during fill by
limiting supply hose length or
increasing supply hose diameters.
Turn the fluid pressure up as high
as possible without exceeding the
maximum limit: 100 psi (0.7 MPa,
7.0 bar).
Manage incoming material
viscosity.
45.
66.
60.
Pump
54.
61.
Replace a
106.
66.
3A8492A