Troubleshooting
6-11
Part 1024496_06
2014 Nordson Corporation
Diagnostic Procedures
Use these diagnostic procedures when directed by the troubleshooting
flowchart. If a diagnostic procedure fails to identify or correct the problem,
return to the troubleshooting flowchart or contact your Nordson
representative for technical assistance.
DP.1 Isolate a Failed Control Component
1. De‐energize the melter. Refer to Section 1, Safety.
See Figure 6‐1.
2. Disconnect the ribbon cable (P/N 1018283) from the main board.
3. Remove all of the hose/gun modules.
4. Re‐energize the melter.
5. Check LED DS5 on the main board, and then do one of the following:
If DS5 does not illuminate, replace the main board (P4 or P7 melters,
use P/N 1028322; P10 melter, use P/N 1038323).
If DS5 does illuminate, go to step 6.
6. Complete the following steps to Isolate the cause of the problem by
individually checking each of the components that were disconnected
from the main board in steps 2 and 3 (CPU and each hose/gun module).
a. De‐energize the melter.
b. Reconnect each component (ribbon cable, and then each hose/gun
module).
c. Re‐energize the melter.
d. Observe LED DS5 (main board).
Replace the component (CPU or hose/gun module) that causes LED
DS5 not to illuminate when the melter is re‐energized.
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