Nordson 3100V Series Customer Product Manual page 248

Control
B 2-15
Over-Tem
perature (OT)
Fau
lt
WARNING:
Risk
of equipment damage, personal injury or
death.
Some
troubleshooting procedures require you to
perform work inside
the electrical enclosure with the power on.
Follow electrical safety procedures and observe all high-voltage
indicators.
Refer
to
Electrical Safety During Troubleshooting
and Opening and Closing the Electrical Enclosure before
performing any
troubleshooting procedure.
1.
Press the CLEAR FAULTS
key.
2.
lf the
fault disappears and the unit appears to be working again, you
may have an intermittent
problem.
Repetitive
faults
in
the same zone
indicate a problem with
the circuitry
in
that zone or an intermittent
RTD
failure.
Electrical noise from DC-drive motors may cause the
triacs that
control heater power
on
the power board to close
independent of the
control
system.
Take
the following steps to
troubleshoot
i
ntermittent over-temperatu
re
faults:
a.
Check
your operating temperature setpoints to make sure they
haven't been
changed.
Refer
to Records
of System Setlings
in
lhe
I
nstal lation section.
When
the
FAULT
light...
And the
Selector
display..
And the
Multipurpose
display...
It means...
Do
this
Turns on
(See Note
A)
Shows a
zone number
(refer to
Table B 2-4)
Flashes OT
(See
Note
B)
trh
A zone's actual
temperature has
reached the
over-temperature
setpoint
entered
in
Feature
3.
The default
setting is
218
oC
(425"F).
Refer to the
following
procedure.
NOTE
A:
When the
FAULT light turns on, the warning output contact is closed and the fault output contact
is
open.
When the
FAULT
light is off, both output contacts are closed.
For
more information on these
output
contacts, refer to
Connecting Output Contactsinlhe
lnstallafion section.
B:
You should base your over-temperature setpoints on your adhesive application
requirements.
Refer
to
System Programming Proceduresinlhe
lnstallation section to program over-temperature setpoints.
@000
Nordson Corporalion
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rights reserued
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lssued
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82EN-04-[3V-X-4XXVI-5