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
before checking or servicing
the system and whenever you are instructed to
discharge the voltage.
To reduce the risk of an injury, follow the
Pressure Relief Procedure, page 39
, whenever
you are instructed to relieve the pressure.
Check all possible remedies in the Troubleshooting
Chart before disassembling the gun.
Voltage
Voltage
Voltage Loss
Loss
Loss Troubleshooting
Troubleshooting
Troubleshooting
Normal spraying voltage for a system using the
waterborne gun is 45-55 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
Spray
Spray Gun
Gun
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
Waterborne
Waterborne Fluid
Fluid
Fluid Hose
Hose
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
Voltage
Voltage Isolation
Isolation
Isolation System
System
System
• Fluid leakage
• Dirty interior
3A2496H
51
