Troubleshooting
Troubleshooting
WARNING
Electric Shock Hazard
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 on page 20 before checking or servicing the system and whenever you are instructed to dis- charge the voltage.
WARNING
Pressurized Equipment Hazard
To reduce the risk of an injury, follow the Pressure Relief Procedure on page 20 before checking or servicing any part of the system and whenever you are instructed to relieve the pressure.
A loss of spraying voltage can be caused by a problem with the spray gun, fluid hose, or voltage isolation sys- tem, since all of the system components are electrically connected through the conductive, waterborne fluid.
Before troubleshooting or servicing the voltage isolation system itself, you need to determine which component in the system is most likely causing a problem. Possible causes include the following:
Spray Gun
•Fluid leakage
•Dielectric breakdown at the fluid hose connection or fluid packings
•Not enough air pressure for the turbine
•Faulty power supply
•Excessive overspray on gun surfaces
•Fluid in the air passages
Waterborne Fluid Hose
•Dielectric failure of hose
•Air gap in the fluid column between the gun and iso- lated fluid supply, causing a low voltage reading on the isolation system voltage meter.
Voltage Loss Troubleshooting
Normal spraying voltage for a system using the water- borne gun is
Voltage Isolation System
•Fluid leakage
•Dirty interior
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