Troubleshooting; General Troubleshooting - Graco HydroShield Instructions Manual

Troubleshooting

Troubleshooting
Troubleshooting Troubleshooting
Installing and servicing this equipment requires
access to parts which may cause an electric shock
or other serious injury if the work is not performed
properly. Do not install or repair this equipment
unless you are trained and qualified.
Follow the Fluid Voltage Discharge and Grounding
Procedure, page 29, before checking or servicing
the system and whenever you are instructed to
discharge the voltage.
General

General Troubleshooting

General Troubleshooting Troubleshooting
Problem Problem Problem
Prime
The system does not prime.
Fluid leaks appear.
74
To reduce the risk of an injury, follow the
Pressure Relief Procedure, page
you are instructed to relieve the pressure.
Diagnosis Diagnosis Diagnosis
Incorrect mode.
Inlet valve is off or stuck.
The isolation fluid pump is not
calibrated and is not showing as
being empty.
The fluid pressure supplied to the
system is too low.
The fluid pressure to the gun is set
to zero or very low.
Seals are worn or there are loose
connections.
31, whenever
Solution
Solution Solution
1. Change to Prime mode.
2. Trigger the gun.
3. Turn on the fluid supply and
check the incoming fluid
pressure.
Test the inlet valve using Main-
tenance screen 5 as described
in Maintenance 5: Misc Valve
Resets and Test, page
Service the solenoid valve or fluid
valve. See Replace a Solenoid
Valve, page 109.
Calibrate the pump and try
Prime mode again. See
Calibrate the Pump, page
Increase the supply fluid pressure.
Maximum is 100 psi (0.7 MPa, 7.0
bar).
Adjust the gun fluid pressure
setting.
See
Check for Fluid Leaks, page 71
locate and correct.
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