Checking The Operation Of The Tank, Grid, Or Manifold Triac; Checking The Resistance Of The Tank, Grid, And Manifold Heaters - Nordson ProBlue Flex Product Manual

Checking the Operation of the Tank, Grid, or Manifold TRIAC

Checking the Resistance of the Tank, Grid, and Manifold Heaters

E 2020 Nordson Corporation
See Figure 6-1 for the location of the indicators on the board.
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 Safety (Section 1).
2. Remove the protective rubber cover from the grid or the manifold heater
terminals (whichever component is faulting).
3. Re-energize the melter and turn the heaters back on.
4. Press on the OLED user interface to enable the Master
Heater Control.
5. While watching indicators DS5 and DS6 on the 6-channel power board,
measure the voltage across the heater terminals as follows:
For an undertemperature or open heater fault, the voltage across the
S
terminals should be within 10 VAC of the voltage being supplied to
the melter when DS5 and DS6 are illuminated.
For a temperature run-away or stuck-on heater fault, the voltage
S
across the terminals should be less than 5 VAC when DS5 and DS6
are not illuminated.
Replace the 6-channel power board if either of the above voltage
conditions are incorrect.
WARNING! Risk of electrocution! Ensure that disconnect switch that serves
the melter is in the off position and locked.
See Figure 6-1 for the location of the connections on the board.
1. De-energize the melter. Refer to Safety (Section 1).
2. Disconnect the power harness plug from receptacle X3 on the 6-channel
power board.
3. Measure the resistance across pins 1 and 2 (melt) or pins 3 and 4
(manifold) on the power harness plug, and then do one of the following:
If the resistance is within the range shown in the following tables, go
S
to step 4.
If the resistance is not within the range shown in the following tables,
S
go to step 8.
Troubleshooting 6-25
Part 1128350_02