Troubleshooting
6-25
Part 1128350_02
E 2020 Nordson Corporation
Checking the Operation of the Tank, Grid, or Manifold TRIAC
SeeFigure6-1forthelocationoftheindicatorsontheboard.
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 Safe ty (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 inte rface 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:
S Foranundertemperatureoropenheaterfault,thevoltageacrossthe
terminals should be within 10 VAC of the voltage being supplied to
the melter when DS5 and DS6 are illuminated.
S Foratemperaturerun-awayorstuck-onheaterfault,thevoltage
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 v oltage
conditions are incorrect.
Checking the Resistance of the Tank, Grid, and Manifold Heaters
WARNING! Risk of electrocution! Ensure that disconnect switch that serves
the melter is in the off position and locked.
SeeFigure6-1forthelocationoftheconnectionsontheboard.
1. De-energize the melter. Refer to Safe ty (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:
S If the resist ance is within the range shown in the following tables, go
to step 4.
S If the resist ance is not within the range shown in the following tables,
go to step 8.
To Next Page
Loading...
Need help?
General
