Troubleshooting
6-2
Part 1128350_02
E 2020 Nordson Corporation
Troubleshooting Checklist
Check the following information before troubleshooting the melter.
Overview
Problems with melter controls are often simple. There are several things that
can be checked quickly and may resolve a problem with low effort.
The following is a list of items that can be verified before extensive and more
time-consuming troubleshooting is nee ded. It is organized by functional area.
Just find the area and check the related items.
AC Power
S Incoming power LED ON (Power Distribution Board DS1)
S Check that upstream AC disconnect is ON
S Check t hat TB1 is attached to Power Distribution board
S Check that LED DS2 is ON
S Check voltage plugs or personality plugs (X9, X10, X11)
S Check power switch on door and connection to LVC
S Check contactors (DS1 on Power Distribution Board and DS1 on
LVC)
S Check cable between LVC X3 and the PDB (one of X4, X6, X7, X12)
S Check fuses on power distribution board
S Check harness between PDB and PDB Expansion Board (if present)
DC Power
S Check AC input connections at PDB X2
S Check power supply LED on power supply under the pneumatic cover
S Check DC output connections at LVC TB1
S CheckpowerswitchonE-Boxdoor
Level
S Check cable connections to LVC X18 and X20
S Check cable connections to the level sensor
S Check sensor calibration
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