Nordson 2304 - Page 63

Troubleshooting 6-5
4. Automatic gun fails to
deposit when triggered
Problem
Possible Reason
Corrective Action Corrective Action
Reset temp dials Reset temp dials
Refer to
1. Tank, hose or
gun temp
setting(s) too
low
2. Clogged gun
nozzle
3. Clogged gun
module
Clogged gun
Charred material from tank or hose
seat lodged in gun seat
Faulty gun
solenoid valve
Worn components
To check:
Faulty
filter/regulator
/-
Incorrect settings used
Charred material from tank or hose
lodged in gun nozzle
Charred material from tank or hose
lodged in gun module
To check:
(a) Relieve system pressure
(b) Remove module from service
block
(c) Trigger gun and note if air flows
from service block
(a) Shut solenoid air off
(b) Remove input air line from
solenoid
(c) Slowly increase air pressure
(d) Note if air flows from open line
Worn components
To check:
(a) Shut gun filter/regulator air off
(b) Remove input air line from
filter/regulator
(c) Slowly increase air pressure
(d) Note if air flows from ooen line
Remove and clean gun nozzle Remove and clean gun nozzle
If yes, go to step 4
If no, go to step 5
If yes, go to step 4
If no, go to step 5
Remove and clean gun seat
If condition persists after reassembly,
rebuild/replace module
Remove and clean gun seat
If condition persists after reassembly,
rebuild/replace module
If yes, replace solenoid
If not, go to step 6
If yes, replace solenoid
If not, go to step 6
If yes, replace filter/regulator
If not, resolve problem with shop air
If yes, replace filter/regulator
If not, resolve problem with shop air
supply
Section 5
Gun
manual
0 No&on Corporation 1994
All Rights Reserved
P/N 106 701A
41-2300SP - 1194