Troubleshooting
5-6
Part 1603227-12
E 2016 Nordson Corporation
Corrective ActionPossible CauseProblem
3. Loss of wrap, poor
transfer efficiency
NOTE: Before checking possible causes, check the help code on the
controller and perform the corrective actions recommended in this section.
Low electrostatic voltage Increase the electrostatic voltage.
Poor electrode connection Remove the nozzle and electrode
assembly. Clean the electrode and
check for carbon tracking or damage.
Check the electrode resistance as
shown on page 5-10. If the electrode
assembly is good, remove the gun
power supply and check its
resistance as shown on page 5-10.
Poorly grounded parts Check the conveyor chain, rollers,
and part hangers for powder buildup.
The resistance between the parts
and ground must be 1 megohm or
less. For best results, 500 ohms or
less is recommended.
4. No kV output from the
spray gun (display
shows 0 kV when gun
triggered), but powder
is spraying
NOTE: Before checking possible causes, check the help code on the
controller and perform the corrective actions recommended in this section.
Damaged gun cable Perform the Gun Cable Continuity
Checks on page 5-11. If an open or
short is found, replace the cable.
Spray gun power supply shorted Perform the Power Supply
Resistance Test on page 5-10.
5. Powder build up on
the electrode tip
Insufficient electrode air wash flow Adjust the electrode air wash needle
valve at the power unit to increase
the electrode air wash flow.
6. No kV output from the
spray gun (display
shows voltage or mA
output), but powder is
spraying
NOTE: Before checking possible causes, check the help code on the
controller and perform the corrective actions recommended in this section.
Spray gun power supply open Perform the Power Supply
Resistance Test on page 5-10.
Damaged gun cable Perform the Gun Cable Continuity
Test on page 5-11.
If an open or short is found, replace
the cable.
7. No kV output and no
powder output
Malfunctioning trigger switch,
display module, or cable
Check the “Gun Triggered On” icon
at the top center of the controller
interface. If the icon is not lit, check
for a H36 help code. Check the
trigger switch connections to the
display module, replace the switch if
necessary.
Perform the Gun Cable Continuity
Test on page 5-11.
NOTE: It may be possible to use the
settings trigger as the spray trigger
until repairs are made. Set Function
F08 to F08−05. Refer to page 4-22.
Continued...
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