Nordson Encore LT Automatic, Customer Product Manual

Page: 48 / 71

Troubleshooting
5-4
Part 1604858-01
E 2013 Nordson Corporation
Corrective Action Possible Cause Problem
7. Powder is spraying,
but no kV output from
the spray gun, display
shows voltage or m A
output
Spray gun power supply open Perform the Power Supply
Resistance Test as described in the
gun manual.
Damaged gun cable Perform the Gun Cable Continuity
Checks as described in the gun
manual.
If an open or short is found, replace
the cable.
8. No kV output and no
powder output
Controller configured for manual
operation
Cycle controller power. If H appears
on the kV/uA display, remove the
main control board and move the JP1
jumper to the Man position.
No trigger signal to controller Check wiring and triggering device.
9. Loss of wrap, poor
transfer efficiency
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
described in the gun manual. If the
electrode assembly is good, remove
the gun power supply and check its
resistance as described in the gun
manual.
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.
10. Powder build up on
the electrode tip
Insufficient electrode air wash flow Remove electrode air wash
connector and check manifold orifice
for blockage. Orifice size is
0.25 − 0.3 mm. Clean with an
appropriate tool.
11. More than one key on
the keypad quits
working when
pressed
Flex connection from the keypad
to the main board is not seated
properly
Loosen and re-seat the flex circuit on
the main board, making sure the flex
cable is fully inserted into the
connector.
To loosen the flex circuit, gently pull
the black bar on the cable connector
away from the white connector. This
will allow you to adjust the flex cable
to ensure proper seating. The cable
should be inserted past the white line
marked towards the end of the cable.
Push the black bar back into the
white connector to secure.