Nordson freedom - Melter Alerts; Melter Faults

Troubleshooting
7-15
Part 1123087_02
 3/2014 Nordson Corporation
Melter Alerts
Alert Message Cause Corrective Action(s)
Electrical cabinet
overtemperature
Electrical cabinet temperature greater
than 70 °C (158 °F)
Make sure the system ambient
temperature is less than 50°C (122 °F).
EcoBead board
disconnected
Header on hose interface board damaged
or disconnected
Check the header connection between
the EcoBead board and the hose
interface board. If the alert persists,
replace the EcoBead board. Refer to
Replacing a Circuit Board in Section 8,
Repair.
NVRAM test failure Internal non‐volatile RAM failed Replace the touchscreen assembly. Refer
to Replacing the Touchscreen Assembly
in Section 8, Repair.
Melter Faults
Fault Message Cause Corrective Action(s)
Analogtodigital failure RTD analog‐to‐digital converter failed Cycle the melter power. If the fault
persists and the software version is later
than 2.655, replace the touchscreen
assembly (refer to Replacing the
Touchscreen Assembly in Section 8,
Repair). If the fault clears, upgrade to
software version 2.665 or later.
Analog-to-digital failure
calibration
RTD analogto‐digital converter could not
be calibrated—grounded RTD in system
Disable and disconnect all hoses and
applicators and cycle the melter power. If
the fault persists after the power is cycled,
go to the first corrective action under the
next cause for this fault message.
If the fault clears, reconnect hoses and
applicators one by one until the fault
reappears. When the fault reappears, the
last connected device is faulty. Look for
an RTD wiring problem, such as a
pinched wire.
RTD analogtodigital converter could not
be calibrated—analog circuit failure
Disable and disconnect all hoses and
applicators and cycle the melter power. If
the fault persists, disconnect the ribbon
cable to the expansion board. If the fault
clears, replace the expansion board. If the
fault persists, replace the main board, the
ribbon cable, or the touchscreen
assembly. Refer to Replacing a Circuit
Board or Replacing the Touchscreen
Assembly in Section 8, Repair.
Continued...