Encore 1102771A Customer Product Manual page 49

Problem
8. No purge air when
Purge button is
pressed
9. Low Powder Flow or
Powder Flow surging
E 2010 Nordson Corporation
Possible Cause
Malfunctioning spray gun display
module, gun cable, or iFlow
module purge solenoid valve; no
air pressure, or kinked air tubing
Low supply air pressure
Air pressure regulator set too low
Supply air filter plugged or filter
bowl full -- water contamination of
flow controller
Flow valve plugged (H24 or H25)
Air tubing kinked or plugged (H24
or H25)
Pump throat worn
Pump not assembled correctly
Pick-up tube blocked
Vibratory box feeder disabled
(VBF units only)
Fluidizing air too high
Fluidizing air too low
Powder hose plugged
Powder hose kinked
Powder hose too long
Gun powder path plugged
Flow and atomizing air tubing
reversed
Troubleshooting
Corrective Action
If display module does not show PU
when purge button is pressed, then
module membrane switch is
defective. Replace display module.
If display module shows PU:
Check the purge air tubing and
solenoid valve on the iFlow manifold.
Perform the Gun Cable Continuity
Test on page 4-11.
Input air must be greater than 5.86
bar (85 psi).
Adjust the input regulator so that the
pressure is greater than 5.86 bar (85
psi).
Remove bowl and drain water/dirt.
Replace filter element if necessary.
Clean system, replace components if
necessary.
See Proportional Valve Cleaning in
this section.
Check flow and atomizing air tubing
for kinks.
Replace pump throat.
Check and re-assemble pump.
Check for debris or bag (VBF units)
blocking pick-up tube.
Set the Custom Function F01 for a
box feeder (F01--01). See Controller
Configuration on page 3-17.
If fluidizing air is set too high the ratio
of powder to air will be be too low.
If fluidizing air is set too low the pump
will not operate at peak efficiency.
Blow out powder hose with
compressed air.
Checked for a kinked powder hose.
Shorten hose.
Check powder inlet tube, elbow, and
electrode support for impact fusion or
debris. Clean as necessary with
compressed air.
Check flow and atomizing air tubing
routing and correct if incorrect.
4-7
Continued...
Part 1102771A