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308496 33
Electrical Tests
WARNING
ELECTRIC SHOCK HAZARD
Follow the Fluid Voltage Discharge
and Grounding Procedure on page 19
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 19
before checking or servicing the system
and whenever you are instructed to relieve the
pressure.
WARNING
FIRE, EXPLOSION, AND
ELECTRIC SHOCK HAZARD
Megohmmeter P/N 241079 (L–see Fig.
22) is not approved for use in a hazard-
ous area. To reduce the risk of sparking,
do not use the megohmmeter to do
electrical tests unless:
The gun has been removed from the
hazardous area;
Or all spraying devices in the hazardous area
are turned off, ventilation fans in the hazardous
area are operating, and there are no flammable
vapors in the area (such as open solvent con-
tainers or fumes from spraying).
Failure to follow this warning could cause fire,
explosion, electric shock and result in serious injury
and property damage.
The performance of the spray gun is directly affected
by the condition of the electrical components contained
inside the gun. The electrical tests can be used to
determine the condition of the power supply and the
resistor stud as well as the continuity of the electrical
path between the components.
Use megohmmeter (L), part no. 241079, and an ap-
plied voltage of 500 volts to complete these electrical
tests. Connect the leads as shown.
Remove the gun from the manifold and bracket, as
instructed on page 35, before performing the electrical
tests.
WARNING
FIRE, EXPLOSION, AND ELECTRIC
SHOCK HAZARD
To reduce the risk of sparking, which
could cause fire, explosion, or electric
shock and result in serious injury, do not
use the megohmmeter in the hazardous
area. Remove the gun from the hazard-
ous area before testing it.
Test Gun Resistance
1.
Prepare the gun for service as instructed on
page 35.
2.
Measure the resistance between the end of the
electrode (13) and the gun body (29). See Fig. 22.
3.
The resistance should be between 329 to 401
megohms. If the resistance is outside the specified
range, measure the power supply and resistor stud
resistance as instructed on page 34.
4.
If you still have problems, refer to Voltage Loss
Troubleshooting , page 26, for other possible
causes of poor performance, or contact the near-
est authorized service agency.
Fig. 22
13
L
29
04313B
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