Dp.5 Check The Resistance Of The Tank And Manifold Heaters; Heater Resistance - Nordson ProBlue P4 Customer Product Manual

DP.5 Check the Resistance of the Tank and Manifold Heaters

E 2014 Nordson Corporation
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.
See Figure 6‐1.
2. Disconnect the power harness plug (P/N 1024529) from receptacle J6 on
the main board.
3. Measure the resistance across pins 1 and 2 (tank) or pins 3 and 4
(manifold) on the power harness plug, and then do one of the following:
S
If the resistance is within the range shown in Table 6‐6, go to step 4.
S
If the resistance is not within the range shown in Table 6‐6, go to step
8.
NOTE: Refer to Appendix E for 400/480 Volt heater resistance data.
Table 6‐6 Heater Resistance
Model
P4
P7
P10
4. Individually check the resistance between the chassis and pins
1 and 2 (tank) or pins 3 and 4 (manifold) on the power harness plug, and
then do one of the following:
S
If the resistance is greater than 1 Meg ohm, return to the
troubleshooting chart.
S
If the resistance is less than 1 Meg ohm, go to step 5.
5. Remove the front and rear panels from the melter. Refer to Section 5,
Cleaning the Melter, for the procedure to remove the panels.
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.
Troubleshooting
Resistance
Tank
46–58 ohms
40–50 ohms
6-17
Manifold
46–58 ohms
Part 1024496_06