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Digital Dosing Units
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Appendix A: Troubleshooting
During setup and use of the Digital Dosing Additive Feeder, personnel may experience
difficulties. Some of the problems encountered may be resolved using the following
techniques.
A.1 General Troubleshooting - Unit Will Not Operate
• Check all connections and process wiring. Note that the process machine input MUST
be wired to a DRY contact for Injection Molding (Section 3.1) and Extruder - Constant
Applications (Section 3.1). For Extrusion - Proportional Applications (Extruder
Follower OPTION) see Section 3.5.
• Ensure the correct Configuration Codes have been entered to configure the Digital
Dosing unit for the process and installation, see Section 2.
A.2 Malfunctions - Error Codes
When a malfunction or error occurs, the controller displays the Alarm symbol and an
error code. The code consists of an “A,” followed by an error number. The control unit will
not operate until the malfunction or error has been corrected. To acknowledge and clear the
alarm, press the Stop key ( ). Once the malfunction is corrected, press to begin
dosing operations.
NOTE: Stop will not correct a malfunction or error.
Following is a table with the error codes, possible reasons for each code, and solutions to the
problems presented.