Troubleshooting
6-16
Part 1024496_06
2014 Nordson Corporation
DP.4 Check the Operation of the Tank or Manifold TRIAC
See Figure 6‐1.
WARNING! Risk of electrocution! Ensure that disconnect switch that serves
the melter is in the off position and locked.
1. De‐energize the melter. Refer to Section 1, Safety.
2. Remove the protective rubber cover from the tank or the manifold heater
terminals (Whichever component is faulting).
3. Re‐energize the melter and turn the heaters back on.
4. Press the Heaters key.
5. While watching LEDs DS1 and DS3 on the main board, measure the
voltage across the heater terminals as follows:
For an F2 fault, voltage across the terminals should be within
10 VAC of the voltage being supplied to the melter when DS1 and
DS3 are illuminated.
For an F3 fault, voltage across the terminals should be less than
5 VAC when DS1 and DS3 are not illuminated.
Replace the main board if either of the above voltage conditions are
incorrect (P4 or P7 melters, use P/N 1028322/P10 melter, use
P/N 1038323).
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