Carrier SUPRA 750Mt - Page 28

2
-
1
6
6
2
-
-
6
1
1
X
X
-
-
2
0
(
0
3
/
0
4
)
The Carrier Transicold microprocessor controller in-
corpora
tes
the following features :
a.
Co
ntr
ol
s
su
pp
ly
or
ret
ur
n
ai
r
tem
pe
rat
ureto
tig
ht
li
m-
its
by
pro
vid
ing
refr
ige
rati
on
con
trol
,
hea
t
anddefrost
to ensure conditioned air delivery to the load.
b.
Du
al
in
de
pe
nd
en
t
re
ad
ou
ts
of
se
t
po
in
t
an
d
su
pp
ly
or
return air
tempera
tures.
c.
Dig
ita
l
rea
do
ut
an
d
ab
ili
ty
to
se
le
ct
da
ta.
Re
fer to
Table 2-5 for Function Codes and Table 2-7 for Unit
Data.
d.
For
al
ar
m
di
gi
tal
di
sp
la
y
id
en
tif
ic
ati
on
Re
fer
to
Table 2-8.
e.
A
se
lf-
te
st
ch
ec
k
on
pr
og
ram
me
mo
ry
an
d
da
ta
mem
ory
.
The
sel
f-tes
t
is
exe
cute
d
eac
h
time
the
sys-
tem is switched from “Stop” to
“Start.” Errors, if
any
,
shall be indicated on the display as a ERR.X, where
X is a number corresponding to the number of the
test. The unit shall display this error for 5 seconds
and then reset the micro.
ERROR
 CAUSE
ERR.1
ERR.2
ERR.3
Processor failure
Check chip installation or replace
microprocessor
ER
R.
4
Di
sp
la
y
bo
ar
d
to
lo
gi
c
bo
ar
d
communication failure.
This can be caused by a defec-
tive ribbon cable or ribbon cable
not plugged in properly.
2
.
8
.
2
K
e
y
p
a
d
Thekeyp
ad
ha
s
12
ke
ys
wh
ic
h
wi
ll
al
lo
w
theope
rat
or
to initiate various functions, display operating data and
change operating parameters.
1.
Display window : shows set--point, box temperature,
operating mode, alarm displays, as well as data on the
unit itself (battery voltage, water temperature etc.).
Function Change key
The
 func
tion
cha
nge
key
 is
us
ed to
displ
ay
the operating parameters. Each
time this key is pressed the display will
adv
anc
e
to
the
nex
t
para
mete
r.
Thiskey
,
in conjunction with the
up/down arrow
and
ente
r
key
s
, will allow the user to
change the parameters.
Arrows key
The UP ARROW and DOWN ARROW
key
s
are
use
d
to
alte
r
the set-
-poin
t.
Pre
ss
theup
or
do
wn
ar
rowkeys
un
tilthe
de
si
re
d
se
tpo
in
t
is
di
sp
la
ye
d
on
the
left-
-hand
sid
e
of
the
dis
pla
y
win
dow
.
When
the
correct
set-
-point i
s
displ
ayed,
pre
ss
th
e
ENT
ER
ke
y
to
co
nfi
rm
the
setting.
The UP ARROW and DOWN ARROW
keys are also used to change the unit
fu
n
c
ti
o
n
s
a
n
d
s
c
ro
l
l
th
ro
u
g
h
th
e
FUNCTION and
UNIT
DA
TA screens.
Enter key
Th
e
EN
TE
R
ke
y
co
nf
ir
ms
ch
an
ge
s
ma
de
to
un
it
op
er
at
io
n.
It
mu
st
be
pre
sse
d
to
cha
nge the
setp
oin
t
afte
r
using the arrow keys to adjust it. If the
ENTER key is not pressed, the setpoint
wi
ll
rev
er
t
to
the
pr
ev
io
us
ly
en
ter
ed
setting.
The ENTER key must also be pressed
whene
ver a
FUNCTION setting is being
altered. If this key is not pressed, the
func
tion
wil
l
reve
rt
to
its
pre
vio
us
sett
ing
.
RUN/STOP switch
Th
e
ma
in
un
it
RU
N/
ST
OP
sw
it
ch
co
nt
ro
ls
th
e
un
it
op
er
at
io
n.
Wh
en
switched to the Run (I) position, the unit
wi
ll
sta
rt
in
the
op
era
tin
g
mo
de
la
st
e
n
te
r
e
d
(
Ro
a
d
o
r
St
a
n
d
b
y
).
Th
e
set-
-poin
t
wil
l
be
at
the
las
t
set-
-poin
t
entered on the keypad.
Road key
The ROAD key puts the unit into Road
(or engine) operation when the unit has
bee
n
pre
vio
usl
y
ope
rate
d
in
the
Stan
dby
mode.
City Speed key
The CITY SPEED key toggles the unit
be
twe
en
hi
gh
sp
ee
d
an
d
lo
w
sp
ee
d
(d
ie
se
l
mo
de
).
Wh
en
Ci
ty
Sp
ee
d
is
se
le
cte
d,
the unit
wi
ll
ru
n
on
ly
in
lo
w
spe
ed
exc
ept
dur
ing
defr
ost
cyc
les
.
This
feature is useful in areas where noise is
restricted.