Bard PH1230, PH1236, PH1224 installation instructions Checking Temperature Sensor Check Out

CHECKING TEMPERATURE SENSOR CHECK OUT

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.

	TEMPERATURE	F vs	RESISTANCE	R OF TEMPERATURE SENSOR
F	R	F	R	F	R	F	R
-25.0	196871	15.0	53640	55.0	17434	95.0	6531
-24.0	190099	16.0	52051	56.0	16984	96.0	6383
-23.0	183585	17.0	50514	57.0	16547	97.0	6239
-22.0	177318	18.0	49028	58.0	16122	98.0	6098
-21.0	171289	19.0	47590	59.0	15710	99.0	5961
-20.0	165487	20.0	46200	60.0	15310	100.0	5827
-19.0	159904	21.0	44855	61.0	14921	101.0	5697
-18.0	154529	22.0	43554	62.0	14544	102.0	5570
-17.0	149355	23.0	42295	63.0	14177	103.0	5446
-16.0	144374	24.0	41077	64.0	13820	104.0	5326
-15.0	139576	25.0	39898	65.0	13474	105.0	5208
-14.0	134956	26.0	38757	66.0	13137	105.0	5094
-13.0	130506	27.0	37652	67.0	12810	107.0	4982
-12.0	126219	28.0	36583	68.0	12492	108.0	4873
-11.0	122089	29.0	35548	69.0	12183	109.0	4767
-10.0	118108	30.0	34545	70.0	11883	110.0	4663
-9.0	114272	31.0	33574	71.0	11591	111.0	4562
-8.0	110575	32.0	32634	72.0	11307	112.0	4464
-7.0	107010	33.0	31723	73.0	11031	113.0	4367
-6.0	103574	34.0	30840	74.0	10762	114.0	4274
-5.0	100260	35.0	29986	75.0	10501	115.0	4182
-4.0	97064	36.0	29157	76.0	10247	116.0	4093
-3.0	93981	37.0	28355	77.0	10000	117.0	4006
-2.0	91008	38.0	27577	78.0	9760	118.0	3921
-1.0	88139	39.0	26823	79.0	9526	119.0	3838
0.0	85371	40.0	26092	80.0	9299	120.0	3757
1.0	82699	41.0	25383	81.0	9077	121.0	3678
2.0	80121	42.0	24696	82.0	8862	122.0	3601
3.0	77632	43.0	24030	83.0	8653	123.0	3526
4.0	75230	44.0	23384	84.0	8449	124.0	3452
5.0	72910	45.0	22758	85.0	8250
6.0	70670	46.0	22150	86.0	8057
7.0	68507	47.0	21561	87.0	7869
8.0	66418	48.0	20989	88.0	7686
9.0	64399	49.0	20435	89.0	7507
10.0	62449	50.0	19896	90.0	7334
11.0	60565	51.0	19374	91.0	7165
12.0	58745	52.0	18867	92.0	7000
13.0	56985	53.0	18375	93.0	6840
14.0	55284	54.0	17898	94.0	6683

Manual 2100-344 Page 16