Troubleshooting
6-27
Part 1128350_02
E 2020 Nordson Corporation
4. Individually check the resistance betwe en the chassis and pins
1 and 2 (melt) or pins 3 and 4 (manifold) on the power harness plug, and
then do one of the following:
S If the resist ance is greater than 1 Megohm, return to the
troubleshooting chart.
S If the resist ance is less than 1 Megohm, go to step 5.
5. Remove the front and rear panels from the melter. For the procedure to
remove the melter cover panels, refer to Remove Melter Panels given
earlier in this section.
CAUTION! Use two wrenches and minimal force when loosening or
tightening the heater terminal connections. Using a single wrench or
excessive force to remove or tighten the terminals nuts can damage the
heater.
6. Using two wrenches, loosen the nuts that hold the power harness leads
to the melt or the manifold heater terminal posts.
7. Individually check the resistance between the chassis and each grid or
each manifold heater terminal post, and then do one of the following:
S If the resist ance is greater than 1 Megohm, replace the power
harness.
S If the resist ance is less than 1 Megohm for the melt heater, replace
the melt reservoir. If the resistance is less t han 1 Megohm for the
manifold, replace the manifold heater. Refer to Parts (Section 8).
8. Remove the front and rear panels from the melter. For the procedure to
remove the melter cover panels, refer to Remove Melter Panels given
earlier in this section.
9. Measure the resistance across the grid heater posts and the manifold
heater posts terminals, and then do one of the following:
S If the resist ance is within the range shown in Tables 6-9 and 6-10,
replace the me lt section harness.
S If the resist ance is not within the range shown in Tables 6-9 and 6-10,
replace the melt reservoir or replace the manifold heater.
NOTE: The melt reservoir heater cannot be replaced independently.
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