Nordson Encore LT Automatic, Customer Product Manual

Page: 47 / 71

Troubleshooting
5-3
Part 1604858-01
E
2013 Nordson Corporation
Corrective Action Possible Cause Problem
3. Low powder flow or
powder flow surging
Low supply air pressure Input air must be greater than 4.0 bar
(58 psi).
Flow air valve plugged Remove valve and check manifold
passages. If manifold is clean,
replace valve.
Air tubing kinked or plugged Check flow and atomizing air tubing
for kinks.
Pump throat worn Replace pump throat.
Pump not assembled correctly Check and re-assemble pump.
Pick-up tube blocked Check for debris or bag (VBF units)
blocking pick-up tube.
Fluidizing air too high If fluidizing air is set too high the ratio
of powder to air will be be too low.
Fluidizing air too low If fluidizing air is set too low the pump
will not operate at peak efficiency.
Powder hose plugged or kinked Check for kinks in hose, blow out with
compressed air.
Powder hose too long or diameter
too small
11mm ID hose length should be no
longer than 7.62 m (25 ft). Shorten
hose if necessary. If hose must be
longer, switch to 1/2 in. ID hose.
Gun powder path plugged Check powder tube, and electrode
assembly for impact fusion or debris.
Clean as necessary with compressed
air.
Flow and atomizing air tubing
connections reversed
Check flow and atomizing air tubing
routing and correct if incorrect.
4. No KV when gun is
triggered On, powder
flow OK
KV set to zero Set KV to a non-zero value.
5. No powder flow when
gun is triggered On,
kV OK
Flow Air or Total Flow set to zero Change settings to a non-zero
number.
Input air turned OFF Make sure air is being supplied to
controller.
6. Powder is spraying,
but no kV output from
the spray gun, display
flashing, shows 0 kV,
0
m
A
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.
Spray gun power supply shorted Perform the Power Supply
Resistance Test as described in the
gun manual.
Continued...