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FAULT TROUBLESHOOTING GUIDE
Fault
Ground Fault (GF)
Over-Voltage
Fault (OU)
Over-Load
Fault (OL)
Current Limit
Fault (CL)
Feedback Fault (FF)
CP-13-06-R5 (09/2018)
Description
The Ground Fault is typically caused
by a ground connection problem, and
can create a safety hazard. It can occur
without high voltage and will not reset.
The Over Voltage Fault indicates the
output voltage exceeds the design
specifications. It typically occurs during
a high voltage trigger.
The Over Load Fault indicates the current
output
has
exceeded
the
threshold. This fault is only active if jumper
17 is shorted. The overload threshold is
normally set at 10 µA below the maximum
output of the applicator.
The Current Limit Fault indicates the
current output of the gun has exceeded
the maximum allowable output current. It
typically occurs with the high voltage on.
The Feedback Fault indicates there is
no current feedback or it is incorrect. It
typically occurs with the high voltage on.
Check for loose wiring between the pc board connector
and the high voltage section by pulling on each wire.
Repair if necessary. Insure both connectors are secure
and re-test for GF fault.
Adjust the setpoint to 20kV and turn on the high
voltage. A GF fault indicates a faulty pc board - replace.
Replace high voltage section.
Send unit in for repair.
Check connections using two finger pull test to ensure
they are connected.
Replace the pc board.
Send unit in for repair.
This may indicate the paint conductivity is too high
overload
(resistance too low) or the outside of the applicator
is contaminated with paint. Test paint for proper
conductivity or clean applicator with non-polar
solvent.
This may indicate the paint conductivity is too high
(resistance too low) or the outside of the applicator
is contaminated with paint. Test paint for proper
conductivity or clean applicator with non-polar
solvent. Ensure dump lines are clean.
Replace applicator and re-test. If problem still exists,
replace main pc board.
Send applicator in for repair.
Send high voltage controller in for repair.
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MAINTENANCE
Solution
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