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Bard W48H1 Manual De Usuario

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Página de 27
Manual 2100-511F
Page
20 of 27
CHECKING TEMPERATURE SENSOR
OUTSIDE UNIT CIRCUIT
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.
3. Check resistance reading to chart of resistance.  Use
sensor ambient temperature.  (Tolerance of part is
± 10%.)
4. If sensor resistance reads very low, then sensor is
shorted and will not allow proper operation of the
heat pump control.
5. If sensor is out of tolerance, shorted, open or reads
very low ohms then it should be replaced.
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
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.
5
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.
6
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.
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.
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.
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2
5
3
2
5
4
3
TEMPERATURE F VS. RESISTANCE R OF TEMPERATURE SENSOR