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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 before checking or servicing
the system and whenever you are instructed to
discharge the voltage.
To reduce the risk of a fluid injection injury, always
follow the Pressure Relief Procedure when you
stop spraying and whenever you are instructed to
relieve the pressure.
NOTE: Check all possible remedies in the Trouble-
shooting Chart before disassembling the gun.
Voltage Loss Troubleshooting
Normal spraying voltage for a system using the water-
borne gun is 45-55 kV. The system voltage is lower due
to spraying current demands and voltage isolation sys-
tem losses.
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.
333013B
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 the hose (pin-hole leak in the
PTFE 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
•
Dielectric breakdown of hoses, seals, or connec-
tions
•
Isolators not functioning properly
Troubleshooting
31
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Table of Contents
Troubleshooting
