Nordson 2304 - Section 6 Troubleshooting

SECTION 6
Troubleshooting
.
1. Introduction
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. 6-l
2. Pump not stroking
6 ....................................
6-2
3. Pump stroking erratically or too fast
........................
.6-4
4. Automatic gun fails to deposit when triggered
............... .6-5
5. Adhesive/air leaks from gun module bleed hole
.............. 6-6
6. Individual gun module misfires
.......................... .6-6
7. Multi-gun modules do not fire at same time
................. .6-6
8. Troubleshooting test procedures
.........................
.6-7
Relieving system hydraulic pressure
..................... 6-7
Checking for blockage in the manifold
.................... .6-7
Manually shifting the actuator ..........................
.6-7
Inspecting the pump siphon ball and seat ................. 6-8
Determining if air flows from the pump solenoid
............ .6-8
Testing solenoid ......................................
6-9
Checking for air leakage from the air motor
................
6-9
9. Operation of the red and yellow LEDs
..................... 6-10
10. Locating the faulty channel ............................
.6-11
11. Red LED lights
.....................................
.6-12
12. Tank, hose or gun fails to heat or underheats
............... 6-13
13. Hot melt material application problems
.................... 6-23
14. Graphs of nickel RTD resistance values (Gun RTD)
......... .6-28
15. Graphs of nickel RTD resistance values (Hose TTD)
........ .6-29
List of Illustrations
Figure 6.1 - Pump Air Regulator at “0 “.
...................... .6-7
Figure 6.2 - Location and Movement of M4 Screw.
........... .6-7
Figure 6.3 -
Siphon Ball and Seat Components.
.............. .6-8
Figure 6.4 -
Disconnecting the Solenoid from the
Actuator Assembly. ....................................
6-8
Figure 6.5 -
Removing the Pump Enclosure.
.................
6-9
Figure 6.6 - Air Motor Leakage Possibilities.
................. .6-9
Figure 6.7 -
Hose and Gun lnline Fuse Locations.
............ .6-14
Q Nofdson Corporation 1994
PIN 106 701A
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41-23OOSP - tssued It94