Nordson 3100V Series Customer Product Manual page 246

Control
B 2-13
d.
Check
your operating temperature setpoints to make sure they
haven't been changed.
Refer
lo
Records
of
System Setfihgs
in
the
I
n
stal
lation section.
e.
lf
the affected zone
is
a hose or gun, replace the hose or gun with
a hose or gun that is known to be
good.
lf the
warning disappears,
replace the defective hose or
gun.
lf the warning still appears,
continue to
the next step.
3.
lf
the warning still appears after you press the CLEAR FAULTS key
and
after you have taken the actions
in step 2, take
the following
steps.
a.
Check
for loose heater connections on the board that supplies the
heater power for the affected zone.
Refer to Table
B 2-5
for heater
connector
locations.
For example, check
the harnesses
connected to X1 and X2
on
the power board to check the heater
connections for hoses
1-4
or
guns
1-4.
See
Figure
B
2-4 for the
location of connectors on boards.
b.
Use
an ohmmeter to check the fuse or fuses on the board that
supplies the heater power for the affected zone.
Refer
to
Figure
B,
2-B
for fuse
locations.
Replace the appropriate fuse
or
fuses.
Refer to Replacing
a
Fusein Repair Procedures. lf the fuse blows
again, make sure the heater is not shorted to the ground.
c.
lf the affected zone
is
the tank, make sure the harness connected
to
J2 on the power board is secure or check the
thermostat.
See
Figure B
2-4for
the location
of
J2 on the power board.
To
check a
thermostat, refer to
Checking
a Thermostatin
Troubleshooting
Procedures.
d.
Check
the
K1
contactors on the 480 VAC distribution board and
the power
board. While pressing the unit's HEATERS key on and
off, listen for the K1 contactors to
engage.
You
can also open the
unit and visually examine the contactors to see
if
they are
engaging. See
Figure B
2-4tor the
location of K1 on the 480 VAC
distribution board and the power board. lf
K1 is not engaging,
replace the 480 VAC distribution board
or
the power board as
appropriate.
Refer
to
Replacing
a
Unit-Specific Board or
Replacing a ControlAssembly Boardin
Repair Procedures.
e.
Check the heater or heater circuit
of
the affected
zone.
Refer
to
Checking a Heater or Heater Circuitin Troubleshooting
Procedures.
f.
lf
the warning condition still appears after you have taken all the
actions
in
this step, replace the control assembly. Refer to
Replacing the Control Assembly in Repair Procedures.
@00
Nordson Corporation
All righls
reserved
41-3000y
lssued 5/00
82
EN-04-[3V-X-4XXVI-5