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 service this equipment unless you are trained and qualified.
Follow the Fluid Voltage Discharge and Ground- ing Procedure on page 16 before checking or servicing the system and whenever you are instructed to discharge the voltage to ensure the voltage is discharged and avoid serious injury from an electric shock.
WARNING
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of an injury, follow the Pressure Relief Procedure on page 16 before checking or servicing any part of the system and whenever you are instructed to relieve the pressure.
Voltage Loss Troubleshooting
Normal spraying voltage for a system using the PRO 3500wb gun is 45 to 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 block, since all of the system components are electrically con- nected through the conductive, waterborne fluid.
Before troubleshooting or servicing the voltage block itself, you need to determine which component in the system is most likely causing a problem. Possible causes include:
Spray Gun
DFluid leakage
DDielectric breakdown at the fluid hose connection or fluid packings
DNot enough air pressure for the turbine
DFaulty power supply
DExcessive overspray on gun surfaces
DFluid in the air passages
Waterborne Fluid Hose
DDielectric failure of hose
DAir gap in the fluid column between the gun and isolated fluid supply, causing a low voltage reading on the isolation system voltage meter.
Voltage Block
DFluid leakage
DDielectric breakdown of hoses, seals, or connec- tions
DIsolators not functioning properly
Visual Check
First, check the system for any visible faults or errors to help isolate whether the spray gun, fluid hose or voltage block has failed. A voltage probe and meter, part no. 236003, is helpful for diagnosing voltage problems and is required for some of the troubleshoot- ing tests that follow.
1.Check that all of the air and fluid tubes and hoses are properly connected.
2.Check that the voltage isolation system valves and controls are properly set for operation. Refer to the voltage isolation system manual.
3.Check that the spray gun and voltage isolation system have sufficient air pressure.
4.Check that the gun ES
5.Check that the voltage isolation system’s enclo- sure door or safety fence gate is closed and that any safety interlocks are engaged and working properly.
6.Make sure the voltage isolation system is in the “isolate” mode, where it is isolating the fluid volt- age from ground.
22 308584