General Troubleshooting Chart - Nordson Encore LT Product Manual

5-2
Troubleshooting

General Troubleshooting Chart

Problem
1. Uneven pattern,
unsteady or
inadequate powder
flow
2. Voids in powder
pattern
Part 1604857-04
Possible Cause
Blockage in spray gun, powder
hose, or pump
Nozzle, deflector, or electrode
assembly worn, affecting pattern
Damp powder
Low atomizing or flow air pressure
Improper fluidization of powder in
hopper
Worn nozzle or deflector
Plugged electrode assembly or
powder path
Corrective Action
1. Purge the spray gun. Remove
and clean the nozzle and
electrode assembly.
2. Disconnect the powder hose from
the spray gun. Blow out the spray
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 inlet and
outlet tubes and elbow. Replace
components as necessary.
Remove and clean 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.
Check the powder supply, air filters,
and dryer. Replace the powder
supply if contaminated.
Increase the atomizing and/or flow air
flow.
Increase the fluidizing air pressure.
If the problem persists, remove the
powder from the hopper. Clean or
replace the fluidizing plate if
contaminated.
Remove and inspect the nozzle or
deflector. Replace worn parts.
Remove and clean the electrode
assembly. Remove and clean the
spray gun powder path (inlet tube,
elbow, and outlet tube) if necessary.
E 2014 Nordson Corporation
Continued...