Thermo Scientific 7400 Series, Руководство по эксплуатации и техническому обслуживанию

Страница: 32 / 60

7007400 Cryoplus 3-9 Thermo Scientific
Section 3
Troubleshooting the Alarms
H
igh
temperatur
e
alarm:
The
alarm
bars
light
and
the
temperatur
e
display
flashes
the
chamber
temperatur
e.
The
audible
alarm
sounds.
R
emote
alarm
contacts
set
to
activ
ate
in
30
minutes.
Alarm
system
resets
if
condition
corr
ects.
The
chamber
temperatur
e
is
warmer
than
the
high
temperatur
e
setpoint.
The
lid
has
been
open
too
long.
An
ex
cessiv
e
heat
load
(warm
pr
oduct)
has
been
placed
into
the
chamber
.
M
ake
sur
e
the
temperatur
e
sleev
e
is
installed
to
lo
w
er
the
chamber
temperatur
e.
Raise
the
high
temperatur
e
setpoint
.
The
chamber
temperatur
e
(at
the
tip
of
the
temperatur
e
pr
obe)
is
dependent
upon
the
height
of
LN
in
the
tank.
The
higher
the
lev
el
of
LN
,
the
colder
the
unit
will
be.
M
ake
sur
e
the
high
temperatur
e
alarm
set
point
is
not
lo
w
er
than
the
height
of
the
LN
is
capable
of
maintaining.
22
2
11
alarm5a.cdr
Level
Sensor
Fill
V
alve
Bypass
V
alve
Open
V
alve
Bypass
Sensor
LN
Source
2
Silence
Temperature
C
o
(Chamber
temperature
display
flashes)
and
The
Alarm
can
only
be
silenced
with
the
key
switch
in
the
Programming
Access
position.
Return
the
key
switch
to
the
Lock
position
after
silence.
Alarms
do
not
ring
back
except
where
noted.
Level
Sensor
Fill
V
alve
Bypass
V
alve
Open
V
alve
Bypass Sensor
LN
Source
2
Silence
e
temperatur
e
display
flashes.
he
display
sho
ws
+199.
The
audible
alarm
sounds.
R
emote
alarm
contacts
set
to
activ
ate
in
30
minutes.
Alarm
system
resets
if
condition
corr
ects.
P
rinter
prints
E
rr
or
Code
12.
The
alarm
bars
light
and
th
T
T
emperatur
e
pr
obe
wir
es
cut
or
br
oken.
The
T
emperatur
e
pr
obe
connector
is
unplugged
fr
om
the
cir
cuit
boar
d.
(F
igur
e
3-2)
P
robe
cir
cuit
failur
e.
R
eplace
or
repair
the
temperatur
e
pr
obe
wir
es.
V
erify
the
cir
cuit
boar
d
connector
.
12
Temperature
C
o
+
199
and
Level
Sensor
Fill
V
alve
Bypass
V
alve
Open
V
alve
Bypass Sensor
LN
Source
2
Silence
Lev
el
Sensor
warning
lamp
flashes
and
the
alarm
bars
light.
The
audible
alarm
sounds.
F
ill
and
B
ypass
valv
es
close.
R
emote
alarm
contacts
set
to
activ
ate
in
30
minutes.
P
rinter
prints
E
rr
or
Code
10.
Lev
el
sensor
or
pr
essur
e
transducer
out
of
calibration.
P
ressur
e
transducer
por
t
in
bottom
of
tank
may
be
clogged
or
blocked.
V
inyl
tubing
to
the
cir
cuit
boar
d
may
leak,
be
kinked
or
cracked,
or
has
become
disconnected
fr
om
the
fitting.
If
alarm
persists,
call
T
echnical
Ser
vices
D
epar
tment.
(The
pr
essur
e
transducer
is
not
a
field-ser
vice
item)
Front
Panel
Alarm
Alarm
Description
/
System
Response
Probable
Cause
Printer
Error
Code
Corrective
Action
10