Carrier VECTOR 1800 MT - Page 240

62-11039
7-109
Alarm
NO.
Steps ALARM / CAUSE CORRECTIVE ACTION
P211 CHECK DEFROST SENSOR (2DTT)
• TRIGGER–ON: Defrost Sensor for Compartment 2 is not within the range of --53°F to +158°F(--47°Cto
+70°C)
•
U
N
I
T
C
O
N
T
R
O
L
:
E
n
g
i
n
e
a
n
d
s
t
a
n
d
b
y
o
p
e
r
a
t
i
o
n
:
p
r
e
t
r
i
p
w
i
l
l
f
a
i
l
a
n
d
d
i
s
p
l
a
y
“
P
R
E
T
R
I
P
F
A
I
L
A
N
D
• UNIT CONTRO
L
: Engine and standby operation: pre--trip will
f
ail and display “PRE--TRIP F
A
I
L
A
ND
COMPLETED”.
• RESET CONDITION: Auto Reset if pre--trip mode is started again, or alarm may be manually reset via
keypad or 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, clear the
alarm(s). (See Note 1) Operate the unit through the appropriate modes to see if any active alarm occurs. Continue
with the steps below as necessary.
1. Check Compartment 2 Defrost Sensor
a. Inspect Return Air Sensor & connector No physical damage to harness.
No moisture, damaged or corroded pins
1MP Plug is connected tightly to microprocessor. No wires
are pushed back through plug.
b. Check Return Air Sensor resistance
(See Note 4)
10,000 Ohms @ 77°F(25°C) [See manual for complete
table of temperatures and resistance values.]
2. Check Compartment 2 Defrost Sensor Wiring
a. Inspect harness & control box
connector pins & terminals (See
wiring schematic)
No physical damage to harness.
No damaged or corroded pins
3. Check Remote Sensor Connector (2 Compartment Units Only)
a.Locate and inspect remote sensor
connector
Capisinplace.
No physical damage.
No moisture or corrosion.
P212 C3 CHECK DEFROST SENSOR (3DTT)
• TRIGGER–ON: Defrost Sensor for Compartment 3 is not within the range of --53°F to +158°F(--47°Cto
+70°C)
•
U
N
I
T
C
O
N
T
R
O
L
:
E
n
g
i
n
e
a
n
d
s
t
a
n
d
b
y
o
p
e
r
a
t
i
o
n
:
p
r
e
t
r
i
p
w
i
l
l
f
a
i
l
a
n
d
d
i
s
p
l
a
y
“
P
R
E
T
R
I
P
F
A
I
L
A
N
D
• UNIT CONTRO
L
: Engine and standby operation: pre--trip will
f
ail and display “PRE--TRIP F
A
I
L
A
ND
COMPLETED”.
• RESET CONDITION: Auto Reset if pre--trip mode is started again, or alarm may be manually reset via
keypad or 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, clear the
alarm(s). (See Note 1) Operate the unit through the appropriate modes to see if any active alarm occurs. Continue
with the steps below as necessary.
1. Check Compartment 3 Defrost Sensor
a. Inspect Return Air Sensor & connector No physical damage to harness.
No moisture, damaged or corroded pins
1MP Plug is connected tightly to microprocessor. No wires
are pushed back through plug.
b. Check Return Air Sensor resistance
(See Note 4)
10,000 Ohms @ 77°F(25°C) [See manual for complete
table of temperatures and resistance values.]
2. Check Compartment 3 Defrost Sensor Wiring
a. Inspect harness & control box
connector pins & terminals (See
wiring schematic)
No physical damage to harness.
No damaged or corroded pins