Troubleshooting
7-23
Part 1123087_02
3/2014 Nordson Corporation
Fill System Troubleshooting
WARNING! Allow only qualified personnel to perform the following tasks.
Follow the safety instructions in this document and all other related
documentation.
About Fill System Alerts/Faults
When the level sensor senses a low level of adhesive in the grid, it calls for
adhesive and the Fill Flutter Delay begins.
NOTE: The Fill Flutter Delay is a user‐specified amount of time that the
control system needs to see a continued call for adhesive from the level
sensor before activating the fill system. For example, if the fill flutter delay is
5seconds and the level sensor calls for adhesive for only 4 seconds, then
the level sensor stops calling for adhesive and the fill system does not
activate.
At the end of the Fill Flutter Delay time, the transfer pump and vibrator
operate simultaneously, running in intervals that range from 2-20 seconds
on, then 20seconds off, until either (1) the Overfill Delay time is reached or
(2) the level sensor is satisfied.
NOTE: The Overfill Delay is a user‐specified amount of time that the fill
system operates. When the fill system is operating, it activates for no less
than 2 seconds and no more than 10 seconds at a time, then it has a
20second off interval. The Overfill Delay time is the sum of all of the on times
that occur between the time the system calls for adhesive and the time the
Overfill Delay time is reached.
If the level sensor is not satisfied by the end of the Overfill Delay time, the
control system generates an alert. If the issue is not resolved by the
user‐specified amount of time entered for Alert to Fault Delay Time, the
control system generates a fault. When a fill fault occurs, Pump Control is
switched Off, but Heater Control remains On. Refer to Fill System
Troubleshooting Table to troubleshoot fill system problems.
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