ACS 653, ACS 663 Service Manual
SP00D00624
2021-04-08
Robert Bosch GmbH
101
Plumbing and Mechanical
Figure 4-9. Refrigerant Identification
REFRIGERANT IDENTIFICATION PROCESS (for ACS 663-RI only)
When the recover or tank fill function is selected, the machine will check pressures on the service hoses.
Once pressure is verified the machine will initiate identification of the refrigerant. The low side identifier solenoid
(S17) will open intermittently, allowing refrigerant to flow to the refrigerant identifier, through the 0.028-inch internal
diameter orifice. After analyzing the refrigerant, the identifier will either send a “PASS” message to the control board
to begin the recovery process, or a “FAIL” message will display. If the refrigerant fails to pass the ID test, the machine
will print the results, and ask if you want to repeat the ID test. If the refrigerant ID test, fails, the test will automatically
repeat at least two more times.
Lo
w
S
id
e
S
erv
ic
e
H
ose
V
ac
uu
m
P
ump
C
om
pr
es
so
r
O
il
1
In
je
ct
B
ott
le
O
il
D
ra
in
B
ott
le
H
igh
S
id
e
S
er
vi
ce
H
ose
Inj
ec
tio
n
M
an
ifo
ld
Acc
um
ul
at
or
Tr
an
sd
uc
er
D
eep
R
ec
ov
er
S
ol
en
oi
d
H
S
G
au
ge
V
ac
uu
m
P
um
p
Ex
ha
ust
Fil
te
r/D
rie
r
H
igh
Pr
ess
ure
C
ut
ou
t S
w
tich
M
ai
n
M
an
ifo
ld
P
um
p
Ex
hau
st
C
he
ck
V
al
ve
O
il
R
et
urn
S
ol
en
oi
d
LS
C
ha
rge
So
leno
id
LS
C
ha
rge
C
he
ck
V
al
ve
H
S
Cha
rge
So
leno
id
H
S
Cha
rge
C
he
ck
V
al
ve
R
ecy
cl
e
So
leno
id
R
ec
ov
er
C
he
ck
Va
lv
e
R
ec
ov
er
So
leno
id
H
ea
t Exc
han
ge
r /
Sys
te
m
O
il
S
ep
ar
at
or
C
om
pr
ess
or
O
il
S
ep
ar
at
or
LS
In
le
t
So
leno
id
H
S I
nl
et
So
leno
id
Va
cuu
m
So
leno
id
O
il I
nj
ec
t 1
So
leno
id
O
il I
nj
ec
t 1
C
he
ck
V
al
ve
O
il
D
ra
in
So
leno
id
S
erv
ic
e
P
ort
ID
O
rif
ic
e
R
ef
rig
er
an
t
Iden
tif
ie
r
R
I F
ilt
er
O
il I
nj
ec
t 2
So
leno
id
O
il I
nj
ec
t 2
C
he
ck
V
al
ve
D
ye
In
je
ct
So
leno
id
D
ye
In
je
ct
C
he
ck
V
al
ve
O
il 2
In
je
ct
B
ott
le
D
ye
In
je
ct
B
ott
le
LS
G
au
ge
ID
S
ol
eno
id
Lo
w
S
id
e
Tr
an
sd
uc
er
A
ir
P
ur
ge
S
ol
en
oi
d
Te
m
p.
S
en
so
r
A
ir
D
iff
us
er
C
on
ta
m
in
at
io
n
P
ort
V
ap
or
Li
qu
id
In
te
rna
l
Tan
k
Tan
k
Li
qu
id
S
ol
en
oi
d
P
re
ss
ur
e
R
eli
ef
IS
V
P
re
ss
ur
e
Tr
an
sd
uc
er
V
ap
or
C
he
ck
V
al
ve
Lo
w
S
id
e
S
to
ra
ge
P
ort
H
igh
S
id
e
S
to
ra
ge
P
ort
F
lu
sh
M
an
ifol
d
RI variants only