Carrier VECTOR 1800 MT - Page 246

62-11039
7-115
Alarm
NO.
Steps ALARM / CAUSE CORRECTIVE ACTION
234 UNIT SERIAL # ERROR
• TRIGGER–ON: There is an error in the Unit Serial Number that is stored in the microprocessor memory
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• 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 Unit Serial 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
235 CONTROL SERIAL # ERROR
• TRIGGER–ON: There is an error in the Microprocessor Serial Number that is stored in the
m
i
c
r
o
p
r
o
c
e
s
s
o
r
m
e
m
o
r
y
m
i
croprocessor memory
• 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 Microprocessor Serial 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