Carrier VECTOR 1800 MT - Page 245

7-114
62-11039
Alarm
NO.
Steps ALARM / CAUSE CORRECTIVE ACTION
7.11 MICROPROCESSOR ALARMS
232 SETPOI NT ERROR
• TRIGGER–ON: There is an error in the Setpoint that is stored in the microprocessor memory
•
U
N
I
T
C
O
N
T
R
O
L
:
U
n
i
t
S
h
u
t
d
o
w
n
&
A
l
a
r
m
• UNIT CONTRO
L
: Unit Shutdown &
A
larm
• RESET CONDITION: Auto Reset when a valid Setpoint is entered, or alarm may be manually reset by
turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active alarm
should clear itself (see reset condition above). Operate the unit through the appropriate modes to see if any active
alarm occurs. Continue with the steps below as necessary.
1. Check Setpoint
a. Check Setpoint setting
M
u
s
t
b
e
b
e
t
w
e
e
n
3
0
°
C
t
o
+
3
2
°
C
(
2
2
°
F
t
o
+
8
9
6
°
F
)
p
g
b. Enter new Setpoint
M
ust
b
e
b
etween --30°
C
to +32°
C
(
-- 2 2 °
F
to +89.6°
F
)
2. Reset Microprocessor
a. Turn the RS off for 30 seconds, then
turn back on.
The microprocessor powers up OK and the latest setpoint
a
p
p
e
a
r
s
i
n
t
h
e
d
i
s
p
l
a
y
.
t
u
r
n
b
a
c
k
o
n
.
b. Valid Setpoint can not be entered.
a
p
p
e
a
r
s
i
n
t
h
e
d
i
s
p
l
a
y
.
Replace microprocessor
233 MODEL # ERROR
• TRIGGER–ON: There is an error in the Model Number that is stored in the microprocessor memory
G
G
O
e
e
s
a
e
o
t
e
o
d
e
u
b
e
t
a
t
s
s
t
o
e
d
t
e
c
o
p
o
c
e
s
s
o
e
o
y
• UNIT CONTROL: Unit Shutdown & Alarm
• RESET CONDITION: Auto Reset only when a valid Model number is entered.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active alarm
should clear itself (see reset condition above). Operate the unit through the appropriate modes to see if any active
alarm occurs. Continue with the steps below as necessary.
1. Check Model Number
a. Check Model Number in
m
i
c
r
o
p
r
o
c
e
s
s
o
r
Must be a valid Model Number from Configuration List.
m
i
c
r
o
p
r
o
c
e
s
s
o
r
b. Enter correct Model Number
From Configuration List, select correct Model Number.
2. Reset Microprocessor
a. Turn RS off for 30 seconds, then turn
back on.
Microprocessor powers up OK
V
a
l
i
d
n
u
m
b
e
r
i
s
p
r
e
s
e
n
t
b. Check for valid Model number in Data
List.
V
a
l
i
d
num
b
er
i
s presen
t
.
Alarm is cleared
R
l
i
c. Valid model number can not be
entered.
Replace microprocessor