Electrical Troubleshooting Chart - Graco PRO AA4500 Instructions-Parts List Manual

ELECTRICAL TROUBLESHOOTING CHART
Readout (SVR"). See ACCESSORIES to order the SVR.
NOTE Additional gun troubleshooting can be done on Gun Part No. 236-031 using the Remote Spraying Voltage
PROBLEM
Poor wrap-around
Operator gets shock
Operator gets shock when
touching workpiece
CAUSE
KV HI-LO lever on low
*ES ON-OFF lever in OFF position
work-piece
Improper distance between gun and
Parts poorly grounded
High booth exhaust velocity
Atomizing air pressure too high,
Fluid pressure too high
Improper fluid viscosity
Fluid resistivity too low
No or low voltage output
*Turbine alternator not operating
Faulty gun resistance
causes short
Fluid leaks from needle packing and
*Faulty turbine alternator
Operator not properly grounded or
is near an ungrounded object
Sun not properly grounded
Norkpiece not properly grounded
SOLUTION
Check lever position
Turn lever to ON
Adjust spraying distance to 8 to 12
inches (203 to 305 mm)
Clean hangers: Check for proper
ground on conveyer or track
limits
Reduce exhaust velocity within code
Reduce atomizing air pressure
Reduce fluid pressure
Check supplier for proper fluid for elec-
trostatic spray
Check fluid resistivity with paint meter
and probe
Check possible causes listed below
Check if ES ON-OFF lever is ON:
Check air supply to gun: Check for dirt
D r moisture in turbine
Check gun resistance
:lean needle cavity: Replace fluid
ieedle assembly
3e sure plug
is
in place on back of tur-
Ane alternator housing; Remove and
:est turbine alternator
3e sure floor is properly grounded:
Near shoes with conductive soles or
wear personal grounding straps: Be
jure operator is not
in
contact with or
:arrying any metallic items which could
mild up electrical charge; If worn, a
jiove must be conductive or modified
IS
shown on page 9
See Check the Electrical Grounding,
~n page 11
:lean workpiece hangers: Check for
,roper ground on conveyor or track
*ES indicator light not on when gun is triggered.
308-294
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