4
Troubleshooting
Refer to your system manual for more troubleshooting procedures, resistance checks, and continuity checks.
Problem Possible Cause Corrective Action
1. Powder not charging,
kV/mA display blinking
Gun power supply shorted Check gun cable and power supply.
Refer to your system manual for
more information.
2. Uneven pattern, unsteady
or inadequate powder
flow
Blockage in spray gun, powder
feed hose, or pump
Check the feed hose and pump.
Nozzle, deflector, or electrode
assembly worn
Remove, clean, and replace as
necessary.
Low pump air pressure Increase pump air setpoints.
Low fluidizing air pressure Increase air pressure.
Damp powder Check powder supply.
3. Voids in powder pattern Worn nozzle or deflector Remove and replace if necessary.
Plugged electrode assembly or
powder path in gun
Remove and clean.
4. Low powder flow or
surging
Low supply air pressure Input air must be greater than 4.0 bar
(58 psi).
Pump throat worn Check and replace if necessary.
Pickup tube blocked Check and clean if necessary.
Fluidizing air not adjusted correctly Check and adjust.
Powder hose plugged, kinked, or
ID too small for length
Check hose. If longer than 20 ft, use
1/2 in. ID hose.
Regulator on controller manifold
plugged or malfunctioning
Remove tubing at controller and
check air flow. Replace regulator if
necessary.
5. Loss of wrap, poor
transfer efficency
Low electrostatic voltage Increase voltage setpoint.
Poor electrode connection Remove and clean. Check electrode
and gun power supply.
Poorly grounded parts Check part grounds. Resistance to
ground should be less than 1
meg-ohm.
6. Powder build up on
electrode
Insufficient air wash air Remove air wash connector from
rear panel. Check orifice for blockage
and clean if necessary.
7. No kV output from gun Damaged gun cable or gun power
supply
Check cable and power supply.
Issued 10/11
Original copyright date 2011. Encore, Nordson, and the Nordson logo are registered trademarks of Nordson Corporation.
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