Carrier SUPRA 750Mt - 2.8.8 Alarm Display

2-17
Manual defrost key
The
MA
NU
AL
DE
FRO
ST
ke
y
pl
ac
es
the
un
it
in
a
de
fr
os
t
cy
cl
e.
Un
de
r
mo
st
conditions it is not necessary to defrost
th
e
un
i
t
ma
nu
a
ll
y
as
th
is
is
do
ne
automatically with the air switch or the
de
fr
os
t
ti
me
r
.
Ma
nu
al
de
fr
os
t
ma
y
b
e
c
o
m
e
n
e
c
e
s
s
a
r
y
d
u
e
t
o
i
c
e
ac
cu
mu
la
ted
on
the
ev
ap
or
ato
r
co
il
during frequent door openings in humid
environments.
Buzzer Off key
The
BUZ
ZER
OFF
ke
y
tem
po
ra
ril
y
tu
rns
off the FAULT ALARM buzzer. The red
lig
ht
“Fau
lt
ala
rm”
rem
ain
s
ill
umi
nate
d
on
the command cab.
Standby key
The STANDBY key places the unit in
Stan
dby (or
ele
ctri
c)
mod
e
whe
n
the
prev
iou
s
mod
e
of
ope
rati
on
has
bee
n
Road.
Pretrip Check key
Not used.
Auto Start/St
op
Continuous key
The
AUTO-
-STAR
T/STOP
key
toggle
s
th
e
un
it
op
e
ra
ti
n
g
mo
d
e
be
tw
ee
n
Auto-
-Start/Stop
and
contin
uous
run.
When the unit is set for Auto--Start/Stop
operation, the unit will run until the box
temp
era
ture
rea
che
s
set-
-poin
t
and
the
n
cyc
le
of
f
(af
ter
themini
mu
m
run
tim
e
ha
s
be
en
me
t)
un
til
fur
the
r
co
ol
in
g
or
he
ati
ng
is
nec
ess
ary
.
Whe
n
in
the
con
tinu
ous
mode, the unit will cycle between heat
and cool as required to maintain the set
tem
pe
ra
tur
e
in
the
bo
dy
.
If
the
se
tpo
in
t
is
bel
ow
-12
_
C(10
_
F)
the
un
it
wi
ll
no
t
he
at,
it
wi
ll
ru
n
co
nti
nu
ou
sl
y
in
lo
w
sp
ee
d
co
ol
.
Unit Data key
i
This
key
scro
lls
the
dis
pla
y
thro
ugh
the
var
io
us
op
era
tin
g
co
nd
iti
on
di
sp
la
ys,
engine temperature or battery voltage, for
example. A more complete description of
the function is found later in this chapter.
Compartment 1 ON/OFF switch
wh
en
sw
itc
he
d
to
(I)
th
e
un
it
an
d
co
mp
a
rt
me
nt
1
wi
ll
st
ar
t
in
th
e
operating mode last entered (cooling
or heating).
Compartment 2 ON/OFF switch
wh
en
sw
itc
he
d
to
(I)
th
e
un
it
an
d
co
mp
a
rt
me
nt
2
wi
ll
st
ar
t
in
th
e
operating mode last entered (cooling
or heating).
Compartment 3 ON/OFF switch
wh
en
sw
itc
he
d
to
(I)
th
e
un
it
an
d
co
mp
a
rt
me
nt
3
wi
ll
st
ar
t
in
th
e
operating mode last entered (cooling
or heating).
16
.
Fa
ul
t
Ala
rm led :
il
lu
mi
na
tes whe
n an
al
ar
m
is
detected.
2.
8.
3
Sw
it
che
s
and
con
tr
ols
Compon
ents required for
monitorin
g
and controlling
the diesel engine--refrigeration system are located in the
electrical box.
Run/Stop switch
RUN
STOP
Wh
en
pl
ac
ed
in
RU
N
po
si
ti
on
,
th
is
s
w
i
t
c
h
p
r
o
v
i
d
e
s
p
o
w
e
r
t
o
t
h
e
microprocessor.
To stop the unit or remove power from
the microprocessor, move the Run/Stop
switch to STOP.
2
.
8
.
4
S
e
t
po
in
t
Setpoints of --30
_
C to +30
_
C (--22
_
F to +86
_
F) may
be entered via
keypad
. The controller alway
s retains the
la
st
en
ter
ed
se
tpo
in
t
in
me
mo
ry
.
If
no
se
tpo
in
t
is
in
me
mo
ry
(i.
e.,
on
in
iti
al
sta
rtu
p)
,
the
co
ntr
ol
le
r
sh
al
l
lo
ck
ou
t
the run relay and flash “SP” on the left hand display until
a valid setpoint is entered.
The setpoint may be changed up or down in whole
numbers until the desired setpoint is displayed. The dis-
play will flash to indicate that the setpoint reading being
displayed is a non-entered value. Each time the
up/down
arr
ow
key
is
pr
es
se
d,
th
e
5
se
co
nd
di
sp
la
y
ti
me
r
wi
ll
be
re-
set.
Depressing the
 enter key
will cause the new dis-
playe
d setpoin
t value to bec
ome activ
e. If
the displ
ay
is
flashing and the new value is not entered, after 5 se-
conds of no keypad activity, the display will revert back
to the active setpoint.