Carrier SUPRA 750Mt - Table 4-4 Sensor Resistance (ATS, DTS, CDT, RAS, SAS & WTS); Controller Sensor Checkout

4-20
CNF1: Glow time
Indicate
s to
the micro which engine is in the system
and which glow time should be used.
CNF2: Discharge sensor
Indicates to the micro if the Discharge sensor is
installed.
CNF3: high setpoint limit
Indicates maximum setpoint allowed and controls
fun
ctio
nal
par
ame
ter
loc
kou
t
in
con
jun
ctio
n
withCNF1
1.
Default is: high speed not active and function lock not
active.
CNF4: Heat lockout override
In
di
ca
te
s
to
th
e
mi
cr
o
if
th
e
h
ea
t
lo
ck
ou
t
i
s
overridden.
CNF5: MOP enable / disable option
Con
fig
ura
tion used
to
ena
ble /
dis
abl
e
the MOP
control
of the
unloa
ders. If
enab
le MOP
is cho
sen,
then
the MOP will control the unloaders. If disable MOP is
chosen, then the unloaders will operate independent of
the
suctio
n
pressu
re.
CNF6: Truck unit
In
di
ca
te
s
to
th
e
mi
cr
o
if
th
e
sy
st
em
ha
s
be
en
selec
ted for
truck operation.
CNF7: Lock in high speed override
In
di
ca
te
s
to
th
e
mi
cr
o
if
lo
ck
in
hi
gh
sp
ee
d
is
overridden.
CNF8: Electric fan
Indi
cate
s
to
the
mic
ro if el
ectr
ic fan
s
are b
ein
g
use
d.
CNF9: Out of range shut down
Indicates if main compartment out of range alarm
shuts unit down after 45 minutes.
CNF11: Functional parameters (keypad) lockout
option
In
con
jun
ctio
n
with
CNF3
,
con
trol
s
the
func
tion
al
parameter keypad lockout options.
CNF13: Heat only unit operation option
Converts unit to a “heat only” unit.
CNF14: Invertable multitemp
Not used.
CNF15: Ultra Fresh II
Not used.
CNF16: Shut down with alternator aux alarm
If CNF16 is on, shut down in diesel when alternator
auxiliary signal is not present.
4.1
9.3
Cont
roll
er
sen
sor
che
cko
ut
An
accura
te
ohmme
ter
must
be
used
to
check
resistance values shown in Table 4-4.
Due to variations and inaccuracies in ohmmeters,
thermom
eters or other test
equip
ment, a reading
within
2% of the chart value would indicate a good sensor. If
a sensor is bad, the resistance reading will usually be
much higher or lower than the resistance values given
in Table 4-4.
At
least
one
lead
from
the
senso
r
(RAS,
termina
ls
D1
an
d
E1
o
r
SA
S,
te
rm
in
al
s
D2
an
d
E2
)
mu
st
be
dis
con
nec
ted
from
the
uni
t
ele
ctri
cal
sys
tem
befo
re
any
reading is taken.
No
t
do
in
g
so
wi
ll
re
su
lt
in
a
fal
se
re
ad
in
g.
Tw
o
pre
fer
re
d
me
tho
ds
of
de
ter
mi
ni
ng
the
ac
tua
l
tes
t
tempera
ture at the
sensor
, is
an ice bath at
0
_
C (32
_
F)
or
a
calib
rated temperature tester.
Table 4-4 Sensor Resistance (ATS, DTS, CDT,
RAS, SAS & WTS)
Temperature
A
TS,
DTS,
RAS,
SAS & WTS
CDT
_
C
_
F
 Resistance
In Ohms
Resistance
In Ohms
-
-
2
8
.
9
-
-
2
0
1
6
5
,
3
0
0
1
,
6
5
3
,
0
0
0
-
-
2
3
.
3
-
-
1
0
1
1
7
,
8
0
0
1
,
1
7
8
,
0
0
0
-
-
1
7
.
8
0
8
5
,
5
0
0
8
5
5
,
0
0
0
-
-
1
2
.
2
1
0
6
2
,
4
0
0
6
2
4
,
0
0
0
-
-
6
.
7
2
0
4
6
,
3
0
0
4
6
3
,
0
0
0
-
-
1
.
1
3
0
3
4
,
5
0
0
3
4
5
,
0
0
0
0
3
2
3
2
,
7
0
0
3
2
7
,
0
0
0
4
.
4
4
0
2
6
,
2
0
0
2
6
2
,
0
0
0
1
0
.
0
5
0
1
9
,
9
0
0
1
9
9
,
0
0
0
1
5
.
6
6
0
1
5
,
3
0
0
1
5
3
,
0
0
0
2
1
.
1
7
0
1
1
,
9
0
0
1
1
9
,
0
0
0
2
5
7
7
1
0
,
0
0
0
1
0
0
,
0
0
0
2
6
.
7 8
0
9
,
3
0
0
9
3
,
0
0
0
3
2
.
2 9
0
7
,
3
0
0
7
3
,
0
0
0
3
7
.
8
1
0
0
5
,
8
0
0
5
8
,
0
0
0
4
3
.
3
1
1
0
4
,
7
0
0
4
7
,
0
0
0
4
8
.
9
1
2
0
3
,
8
0
0
3
8
,
0
0
0
9
0
1
9
4
9
1
5
9
,
1
5
0
1
0
0
2
1
2
6
8
0
6
,
8
0
0
1
3
0
2
6
6
3
0
1
3
,
0
1
0
1
5
0
3
0
2
1
8
6
1
,
8
6
0
1
6
3
3
2
5
-
-
1
,
3
5
8
1
7
7
3
5
0
-
-
1
,
2
0
2