Melter Faults - Nordson ProBlue P4 Customer Product Manual

6-2
Troubleshooting

Melter Faults

Display
Code/Sub‐code
F1/None RTD
Under
F2/None
temperature
F3/None Over temperature
F4/1 RAM test
Internal Clock
F4/2
time
Internal clock
F4/4 battery backed
RAM
Internal clock
F4/5
battery
F4/6 Analog‐to‐digital
Part 1024496_06
Table 6‐1 lists the four types of melter faults, potential causes, and expected
corrective actions.
Table 6‐1 Melter Faults
Name Affect on Melter
Heaters turn off
Heaters turn off
Heaters turn off
Melter stops
functioning
Heaters remain on,
but fault condition
persists
Heaters remain on,
but fault condition
persists
Heaters remain on,
but fault condition
persists
Melter stops
functioning
Cause
The RTD for the
component indicated
has failed or the
component was
disconnected from
the melter.
The actual temperature
of the component
indicated has dropped
below the under
temperature delta,
which was set using
parameter 22.
The actual temperature
of the component
indicated has increased
beyond the over
temperature delta,
which was set using
parameter 21.
Internal RAM failure
Internal clock failure
Battery‐backed RAM
failure
Battery‐backed RAM
battery dead
RTD analog‐to‐digital
converter failed
Corrective Action
Replace RTD
Check hose/gun
connections
See flowchart T.2
Check for conditions
that may cause a drop
in ambient temperature
Raise the set‐point
temperature of the
component
Replace RTD
See flowchart T.2
Replace RTD
See flowchart T.2
Replace CPU
Replace CPU
Replace CPU
Replace CPU
Replace main board or
CPU
Continued...
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