HP GRACO OR PRO TI1681A 사용자 설명서

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.

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:

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

Dielectric failure of hose (pin-hole leak through 
PTFE layer)

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.

Fluid leakage

Dirty interior

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.

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.