9-2
7007452 CryoMed Freezer
Thermo Scientific
Troub
le
sho
ot
in
g Guid
e
Sy
m
p
to
m
P
os
si
ble Cau
se
V
erification
Solu
tion
Che
c
k LN
2
Su
ppl
y
A
lar
m
1
). L
N
2
s
u
ppl
y
t
a
n
k
e
m
pt
y
2). L
N
2
s
u
ppl
y
pres
su
re t
oo l
o
w
3). L
N
2
s
u
ppl
y
h
o
se
t
o
o l
o
n
g
4). L
N
2
so
leno
id
s b
ad
5). C
o
n
trol
le
r boa
rd ba
d
1). Veri
fy
s
u
ppl
y
t
ank
con
te
n
ts
adequ
at
e?
2). Veri
fy
t
a
nk
pres
su
re (reg
u
lat
or:
22# n
o
m
in
a
l)
3). 4’
/6’
f
lex
li
n
e to tank
or v
ac
u
um
i
n
su
lated
pl
um
bi
n
g
?
4
).
Che
ck so
le
no
id
o
p
er
atio
n (
so
und
&
ga
s
flo
w
) i
n
m
anu
al
m
ode an
d ch
a
m
ber tem
p
eratu
re drop. If
m
o
re t
h
a
n
90/
207VA
C
acros
s s
o
le
n
o
id
s an
d n
o
s
o
u
n
d
or tem
p
erat
u
re drop:
5). If
les
s th
a
n
90/
207VA
C
acros
s s
o
le
n
o
id (an
d
AC
su
ppl
y
i
s adequ
ate):
1
). Replace/f
ill tank
2). R
eplace tan
k
/regu
lator
3). R
eplace/u
pg
rade
ho
se
/p
lu
mb
ing.
4). R
eplace s
o
len
oids
5). R
eplace con
troller b
o
ard
Fan
w
ill
n
o
t run
1
). Fu
se on
con
troller board
2).
T
h
erm
al c
u
t-
ou
t i
n
m
o
tor
(m
ot
or ov
erh
eat
in
g
)
3). C
o
n
troller boa
rd
1). C
h
eck
fus
e/v
al
u
e
1a). C
h
eck
f
o
r un
obs
tru
c
te
d rot
at
io
n
of
f
a
n
1b). Ch
eck
f
o
r f
ree rotation
of
m
o
tor sh
a
ft.
1c). C
h
eck
f
o
r ex
ce
ss
iv
e
m
o
tor cu
rrent v
s. na
m
e
pl
at
e. 12
0/
230VA
C
s
trappi
ng
i
n
correct
?
If
n
o
t:
1d). C
h
eck
f
o
r ex
cess
iv
e
m
o
tor cu
rren
t a
n
d
120/
23
0VA
C
st
rappi
n
g
correct
?
2). C
h
eck
i
f les
s t
h
a
n
90/207VA
C
acros
s
m
o
tor in
m
anu
al
m
ode w
it
h
f
a
n
on
.
2a). 1
20/
2
30VA
C
s
trappi
ng
i
n
m
o
to
r vs
. AC
su
ppl
y
3). Meas
u
re
m
o
re th
an
90/207VAC
acros
s
m
o
tor in
m
anu
al
m
ode
w
ith
m
o
tor on
. If
n
o
t:
1). R
eplace f
u
se
1
a)
. M
o
ve
/a
dj
ust to
e
li
m
in
at
e
obs
tr
u
ct
io
n
.
1b). R
eplace m
o
tor
1c). C
o
rrect
120/
230VA
C
st
rappi
n
g
.
1d). R
eplace m
o
tor
2). C
o
rrect
A
C
s
u
ppl
y
probl
em
2a). C
o
rrect m
o
tor s
trappin
g
3). R
eplace con
troller b
o
ard
Содержание 7450
Страница 1: ...Model 7452 Series CryoMed Controlled Rate Freezer Operating and Maintenance Manual 7007452 Rev 11 ...
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Страница 114: ...7007452 CryoMed Freezer AA 1 Thermo Scientific ...
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Страница 120: ...Thermo Scientific Controlled Environment Equipment 401 Millcreek Road Marietta Ohio 45750 United States www thermo com ...