Under-Temperature (Ut) Warning - Nordson 3100V Series Customer Product Manual

B
2-12
Control
Under-Temperature (UT) Warning
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 and wait for the system to
return to
the system-ready state.
2.
lf the
warning disappears and the unit appears to be working again,
the
voltage to the unit may have temporarily sagged or you may have
an intermittent
problem. Repetitive warnings
in
the same zone
indicate
a problem with the circuitry
in
that zone ot
an
intermittent
RTD
failure.
Take the
following steps to troubleshoot intermittent
under-temperature warnings:
a.
Check
for
a
change in environmental conditions, such as added
ventilation or sources of drafts.
A cold
draft can keep your unit,
hoses, and guns from heating.
b.
Make sure
the power is turned on at your branch circuit disconnect
switch and that your power supply is supplying the proper voltage
to
the unit.
c.
Check all hose and gun electrical
plugs.
Make sure
the
connections are tight and free of corrosion.
When
the
FAULT
light....
And the
Selector
display..
And the
Multipurpose
display...
It means...
Do
this...
Flashes
(See Note A)
Shows a
zone number
(refer to
Table
B 2-3)
Flashes UT
(See Note
B)
UL
The indicated zone's
actualtemperature is
more than
19.5 'C (35 'F)
below the setpoint
temperature.
Refer to the following
procedure.
NOTE A: When the
FAULT
light flashes, the warning output contact is open and the fault output contact is closed
When the FAULT light
is
off, both output contacts are closed.
For more information on these output
contacts, refer to
Connecting Output Contacts in
lhe lnstallafion
section.
B:
UT
(under{emperature) occurs when a heater zone is more
than
19.5
C (35 F) under the setpoint
temperature.
82EN-04-[3V-X-4XXU-5
41-3000y
lssued 5/00
@
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