Troubleshooting
6-24
Part 1128350_02
E 2020 Nordson Corporation
Removing the Manifold RTD
1. Remove the RTD from its retention hole.
2. To replace the RTD, insert the RTD into its retention hole.
Checking the Operation of the Power Relay
SeeFigure6-1forthelocationoftheindicatorsontheboard.
The pre-conditions for this diagnostic procedure are as follows:
- The power switch is On and indicator DS21 on the LVC is illuminated.
- Indicator DS22 illuminates to green.
If DS22 illuminates to red, go to Removing the Level Sensor, Melt
RTD, or Melt Thermostat givenearlierinthissection.
NOTE: If a zone is undertemperature, under voltage, or an open heater fault
reoccurs after re-energizing the melter, reset the fault and turn the Master
Heater control back On.
1. Press
on the OLED user inte rface to enable the Master
Heater Control.
2. Check LVC indicator DS1 and do one of the following:
a. If DS1 does not illuminate, go to step 3.
b. If indicator DS1 does illuminate, go to step 4.
3. Isolate the failing component:
a. De-energize the melter.
b. Remove the cable connected to LVC X3.
c. Re-energize the melter.
d. Set the Master Heater Control On.
4. Check if indicator LVC DS1 illuminates.
If DS1 illuminates, replace the power distribution board or replace the
LVC board.
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