Bard Q48H1 User Manual
Manual
2100-519C
Page
37 of 42
CHECKING TEMPERATURE SENSOR
1. Disconnect temperature sensor from board and from
outdoor coil.
2. Use an ohmmeter and measure the resistance of the
sensor. Also use ohmmeter to check for short or
open.
open.
3. Check resistance reading to chart of resistance use
sensor ambient temperature. (Tolerance of part is ±
10%.)
10%.)
4. If sensor resistance reads very low, then sensor is
shorted and will not allow proper operation of the
heat pump control.
heat pump control.
5. If sensor is out of tolerance, shorted, open, or reads
very low ohms then it should be replaced.
TABLE 6
TEMPERATURE (F) VS RESISTANCE (R) OF TEMPERATURE SENSOR
F
R
F
R
F
R
F
R
F
R
0
.
5
2
-
0
.
4
2
-
0
.
3
2
-
0
.
2
2
-
0
.
1
2
-
0
.
0
2
-
0
.
9
1
-
0
.
8
1
-
0
.
7
1
-
0
.
6
1
-
0
.
5
1
-
0
.
4
1
-
0
.
3
1
-
0
.
2
1
-
0
.
1
1
-
0
.
0
1
-
0
.
9
-
0
.
8
-
0
.
7
-
0
.
6
-
0
.
5
-
0
.
4
-
0
.
3
-
0
.
2
-
0
.
1
-
0
.
0
0
.
1
0
.
2
0
.
3
0
.
4
1
7
8
6
9
1
9
9
0
0
9
1
5
8
5
3
8
1
8
1
3
7
7
1
9
8
2
1
7
1
7
8
4
5
6
1
4
0
9
9
5
1
9
2
5
4
5
1
5
5
3
9
4
1
4
7
3
4
4
1
6
7
5
9
3
1
6
5
9
4
3
1
6
0
5
0
3
1
9
1
2
6
2
1
9
8
0
2
2
1
8
0
1
8
1
1
2
7
2
4
1
1
5
7
5
0
1
1
0
1
0
7
0
1
4
7
5
3
0
1
0
6
2
0
0
1
4
6
0
7
9
1
8
9
3
9
8
0
0
1
9
9
3
1
8
8
1
7
3
5
8
9
9
6
2
8
1
2
1
0
8
2
3
6
7
7
0
3
2
5
7
0
.
5
0
.
6
0
.
7
0
.
8
0
.
9
0
.
0
1
0
.
1
1
0
.
2
1
0
.
3
1
0
.
4
1
0
.
5
1
0
.
6
1
0
.
7
1
0
.
8
1
0
.
9
1
0
.
0
2
0
.
1
2
0
.
2
2
0
.
3
2
0
.
4
2
0
.
5
2
0
.
6
2
0
.
7
2
0
.
8
2
0
.
9
2
0
.
0
3
0
.
1
3
0
.
2
3
0
.
3
3
0
.
4
3
0
1
9
2
7
0
7
6
0
7
7
0
5
8
6
8
1
4
6
6
9
9
3
4
6
9
4
4
2
6
5
6
5
0
6
5
4
7
8
5
5
8
9
6
5
4
8
2
5
5
0
4
6
3
5
1
5
0
2
5
4
1
5
0
5
8
2
0
9
4
0
9
5
4
1
0
0
2
6
4
5
5
8
4
4
4
5
5
3
4
5
9
2
2
4
7
7
0
1
4
8
9
8
9
3
7
5
7
8
3
2
5
6
7
3
3
8
5
6
3
8
4
5
5
3
5
4
5
4
3
4
7
5
3
3
4
3
6
2
3
3
2
7
1
3
0
4
8
0
3
0
.
5
3
0
.
6
3
0
.
7
3
0
.
8
3
0
.
9
3
0
.
0
4
0
.
1
4
0
.
2
4
0
.
3
4
0
.
4
4
0
.
5
4
0
.
6
4
0
.
7
4
0
.
8
4
0
.
9
4
0
.
0
5
0
.
1
5
0
.
2
5
0
.
3
5
0
.
4
5
0
.
5
5
0
.
6
5
0
.
7
5
0
.
8
5
0
.
9
5
0
.
0
6
0
.
1
6
0
.
2
6
0
.
3
6
0
.
4
6
6
8
9
9
2
7
5
1
9
2
5
5
3
8
2
7
7
5
7
2
3
2
8
6
2
2
8
0
6
2
3
8
3
5
2
6
9
6
4
2
0
3
0
4
2
4
8
3
3
2
8
5
7
2
2
0
5
1
2
2
1
6
5
1
2
9
8
9
0
2
5
3
4
0
2
6
9
8
9
1
4
7
3
9
1
7
6
8
8
1
5
7
3
8
1
9
8
9
7
1
4
3
4
7
1
4
8
9
6
1
7
4
5
6
1
2
2
1
6
1
0
1
7
5
1
0
1
3
5
1
1
2
9
4
1
4
4
5
4
1
7
7
1
4
1
0
2
8
3
1
0
.
5
6
0
.
6
6
0
.
7
6
0
.
8
6
0
.
9
6
0
.
0
7
0
.
1
7
0
.
2
7
0
.
3
7
0
.
4
7
0
.
5
7
0
.
6
7
0
.
7
7
0
.
8
7
0
.
9
7
0
.
0
8
0
.
1
8
0
.
2
8
0
.
3
8
0
.
4
8
0
.
5
8
0
.
6
8
0
.
7
8
0
.
8
8
0
.
9
8
0
.
0
9
0
.
1
9
0
.
2
9
0
.
3
9
0
.
4
9
4
7
4
3
1
7
3
1
3
1
0
1
8
2
1
2
9
4
2
1
3
8
1
2
1
3
8
8
1
1
1
9
5
1
1
7
0
3
1
1
1
3
0
1
1
2
6
7
0
1
1
0
5
0
1
7
4
2
0
1
0
0
0
0
1
0
6
7
9
6
2
5
8
9
9
2
9
7
7
0
9
2
6
8
8
3
5
6
8
9
4
4
8
0
5
2
8
7
5
0
8
9
6
8
7
6
8
6
7
7
0
5
7
4
3
3
7
5
6
1
7
0
0
0
7
0
4
8
6
3
8
6
6
0
.
5
9
0
.
6
9
0
.
7
9
0
.
8
9
0
.
9
9
0
.
0
0
1
0
.
1
0
1
0
.
2
0
1
0
.
3
0
1
0
.
4
0
1
0
.
5
0
1
0
.
6
0
1
0
.
7
0
1
0
.
8
0
1
0
.
9
0
1
0
.
0
1
1
0
.
1
1
1
0
.
2
1
1
0
.
3
1
1
0
.
4
1
1
0
.
5
1
1
0
.
6
1
1
0
.
7
1
1
0
.
8
1
1
0
.
9
1
1
0
.
0
2
1
0
.
1
2
1
0
.
2
2
1
0
.
3
2
1
0
.
4
2
1
1
3
5
6
3
8
3
6
9
3
2
6
8
9
0
6
1
6
9
5
7
2
8
2
7
9
6
4
0
7
5
5
6
4
4
5
6
2
3
5
8
0
2
5
4
9
0
5
2
8
9
4
3
7
8
4
7
6
7
4
3
6
6
7
2
6
5
4
4
6
4
4
7
6
3
4
4
7
2
7
2
8
1
4
3
9
0
4
6
0
0
4
1
2
9
3
8
3
8
3
7
5
7
3
8
7
6
3
1
0
6
3
6
2
5
3
2
5
4
3