Replace The Wash Fluid, Page - Graco HydroShield WABH00 Instructions - Parts Manual

Troubleshooting
Problem
Problem Problem
Voltage is still present at the gun
after the trigger is released.
Voltage is still present at
the gun after following the
Fluid Voltage Discharge and
Grounding Procedure, page
Paint goes backward toward the
paint supply.
Other issues
Paint build-up on the isolation
valve stem.
74
Diagnosis
Diagnosis Diagnosis
Incorrect voltage level display
Ground Rod Delay setting.
The ground rod (18) does not
lower.
The ES request input is still active. Remove the ES request input
Air pocket in the fluid line leaves
fluid isolated near the gun.
Issue with the door switch.
29.
Faulty inlet valve and check valve.
1. Dirty wash fluid can no longer
clean properly.
2. The U-cup seals are not wiping
the isolation valve stem clean.
3. The isolation valve stem (222)
o-ring is not sealing fully.
Solution
Solution Solution
Check system voltage using a
probe (236003).
Calibrate the bleed resistor as
described in Calibrate the Bleed
Resistor, page 58.
Check or replace the kV
board as described in
Replace a kV Board, page
Adjust the Ground Rod Delay
setting on the System screen. See
System Screen, page 66.
Follow the procedure in
Check and Lubricate the Ground
Rod, page 69.
signal.
Determine cause and correct.
Purge air from the fluid line.
Check the door
switch as described in
Check the Door Switch, page
With the shuttle down, test the
Shuttle Fluid In, Pump Fluid In, and
Pump Pressure valves individually
on Maintenance Screen 4. If fluid
is in valves at the same time as
there is pump pressure, this can
result in fluid back-flowing if a
check valve is not present.
See Maintenance 4: Fluid Valve
Resets and Test, page
Check for a leaky check valve.
1. Follow the steps in
the Wash Fluid, page
2. Replace wash fluid U-cups as
seen in repair section.
3. Replace the isolation valve
stem o-ring as described in
Replace the Isolation Valve
Stem O-rings, page
106.
70.
61.
Replace
69.
96.
3A8492A