Carrier BWMAAN000050, Installation, Operation And Maintenance Manual, Page: 50 / 72

50
13 - TROUBLE SHOOTING
Is ha
rne
s
s plug
ged
in
to
Return
Te
mpe
rat
ur
e
Se
ns
or
?
Is harness
plugged into Control
Module J5?
_ P _ _ _
Blocking Error E 5 2 Return Sens
Open
Replac
e Re
tur
n
T
empera
tur
e Se
nsor
Replace Control
Module
Check
continuity of brown
wires between
Return
T
e
mperature Sensor and
Control Modu
le J5
-4 an
d J5
-1
2
Continuity?
Measure Re
tu
rn
Te
mpe
rature
Sen
s
o
r re
sistance with
d
igita
l
meter.
Es
timat
e
Sens
or
temperature.
Do temperature
and resist
ance f
a
ll
within
ran
g
es sh
own in ch
art?
Re
place Wires
5
0
to
9
0
1
0
to
3
2
9K to
2
4
K ohms
15
0 to
2
0
0
90 to 130
°F
°C
R
e
s
istan
ce
13
0 to
1
5
0
2K
to 1K ohms
2K
to 3K ohms
3K
to 9K ohms
5
4
to
6
6
3
2
to
5
4
6
6
to
9
4
Return Temperature Sensor
Re
sistance
Cha
rt
YE
S
NO Inser
t Ha
rnes
s
YE
S
NO
YE
S
NO