Carrier SUPRA 850Mt - Microprocessor Controller Operation

2-15
2.8
MIC
ROP
ROC
ESS
OR
CON
TRO
LLER
1. Display
2. Up and down arrow keys
3. Function change key
4. Run/Stop switch
5. Road key
6. Comp. 1 ON/OFF switch
7. City speed key
8. Comp. 2 ON/OFF switch
9. Manual defrost key
10. Comp. 3 ON/OFF switch
11. Buzzer off key
12. Standby key
13. Pretrip key ( not used )
14. Auto-start/Stop key
15. Unit data key
16. Fault alarm led
17. Enter key
1.
3.
2.
17.
4.
5.
7.
9.
1
1.
12.
13.
14.
15.
16.
6.
8.
10.
Figure 2-
7
Cab C
ommand
2.
8.
1
In
tr
od
uc
ti
on
The microprocessor controller is housed in the con-
tro
l
bo
x.
Thi
s
co
ntr
ol
le
r
co
ns
is
ts
of
2
co
ntr
ol
bo
ar
ds
an
d
a relay module :
1.
The Processor Board includ
es the
microp
rocess
or,
program memory, and necessary input/output cir-
cuitry to interface with the unit.
2.
The
Rel
ay
Mod
ule
con
tain
s
repl
ace
abl
e
rel
ays
,
diodes and fuses along with the wiring harness.
The Cab Command is remote mounted in the
truck.
The Cab Command includes the LCD display, keypad
and keypad interface (see Figure 2-7).
CAUTION
Unde
r
no
cir
cum
sta
nce
s
shoul
d
anyo
ne
attempt to repair the Logic or Display
Boards!
Shoul
d
a
prob
lem devel
op
wit
h
the
se
co
mp
on
en
ts
,
co
nt
ac
t
yo
ur
ne
ar
es
t
C
a
r
r
i
e
r
T
r
a
n
s
i
c
o
l
d
d
e
a
l
e
r
f
o
r
replacement.