Troubleshooting
7-14
Part 1123087_02
3/2014 Nordson Corporation
Melter Troubleshooting
WARNING! Allow only qualified personnel to perform the following tasks.
Follow the safety instructions in this document and all other related
documentation.
About Melter Alerts/Faults
An alert indicates a potential problem. The hot melt system will continue to
operate unless the problem goes unresolved for two minutes, at which point
the control system will generate a fault. When a fault occurs, Pump Control
and Heater Control are automatically switched Off.
If an alert/fault appears, investigate and correct the situation that caused the
alert/fault and then clear or reset the alert/fault. The control system will
continue to generate the alert/fault condition until the situation is resolved.
Heated Zone Alerts/Faults
Alert/Fault Message Cause Corrective Action(s)
Internal or external
temperature for [zone
name] has dropped below
defined setpoint threshold
Component has dropped below
undertemperature setpoint
Check for conditions that may cause a
drop in zone temperature or replace the
component.
Internal or external
temperature for [zone
name] has risen above
defined setpoint threshold
Component has risen above
overtemperature setpoint
Check for conditions that may cause an
increase in zone temperature or replace
the component.
Internal or external short
RTD on [zone name]
RTD resistance too low (damaged wiring
or failed RTD)
Check the connections. Repair or replace
the damaged wiring or RTD or replace the
device containing the RTD.
Internal or external open
RTD on [zone name]
RTD resistance too high (loose
connector, damaged wiring, or failed
RTD)
Check the connections. Repair or replace
the damaged wiring or RTD or replace the
device containing the RTD.
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