Nordson Encore LT Automatic, Customer Product Manual

Page: 46 / 71

Troubleshooting
5-2
Part 1604858-01
E 2013 Nordson Corporation
General Troubleshooting Chart
Problem Possible Cause Corrective Action
1. Uneven pattern,
unsteady or
inadequate powder
flow
Blockage in spray gun, powder
hose, or pump
1. Purge the spray gun. Remove the
nozzle and electrode assembly
and clean them.
2. Disconnect the powder hose from
the spray gun and blow out the
gun with an air gun.
3. Disconnect the powder hose from
the pump and gun and blow out
the hose. Replace the hose if it is
clogged with powder.
4. Disassemble and clean the pump.
5. Disassemble the spray gun.
Remove and clean the powder
tube. Replace components as
necessary.
Nozzle, deflector, or electrode
assembly worn, affecting pattern
Remove, clean, and inspect the
nozzle, deflector, and electrode
assembly. Replace worn parts as
necessary.
If excessive wear or impact fusion is
a problem, reduce the flow and
atomizing air.
Damp powder Check the powder supply, air filters,
and dryer. Replace the powder
supply if contaminated.
Low atomizing or flow air pressure Increase the atomizing and/or flow air
flow.
Improper fluidization of powder Increase the fluidizing air pressure.
Hopper: If the problem persists,
remove the powder from the hopper.
Clean or replace the fluidizing plate if
contaminated.
VBF: Check the pickup tube. If the
diffuser in the base of the tube is
clogged and cannot be cleaned,
replace the pickup tube.
2. Voids in powder
pattern
Worn nozzle or deflector Remove and inspect the nozzle or
deflector. Replace worn parts.
Plugged electrode assembly or
powder path
Remove and clean the electrode
assembly. If necessary, remove the
and clean the powder path.
Continued...