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 service this equipment
unless you are trained and qualified.
Follow the
Fluid Voltage Discharge and Grounding
before checking or servicing
the system and whenever you are instructed to
discharge the voltage.
To reduce the risk of a skin injection injury, always
follow the
Pressure Relief Procedure, page 26
whenever you are instructed to relieve the
pressure.
NOTE: Check all possible remedies in the
Troubleshooting Chart before disassembling the gun.
Voltage Loss Troubleshooting
Normal spraying voltage for a system using the
waterborne gun is 40–50 kV. The system voltage is
lower due to spraying current demands and voltage
isolation system losses.
A loss of spraying voltage can be caused by a
problem with the spray gun, fluid hose, or voltage
isolation system, 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 alternator turbine
• Faulty power supply
• Excessive overspray on gun surfaces
• Fluid in the air passages
Waterborne Fluid Hose
• Dielectric failure of the hose (pin-hole leak in the
inner layer)
• Air gap in the fluid column between the gun and the
isolated fluid supply, causing a low voltage reading
on the isolation system voltage meter.
Voltage Isolation System
• Fluid leakage
• Dirty interior
40
3A2497C
