Bard W18H1 Installation Instructions Manual

Bard W18H1 Installation Instructions Manual Manual pdf 20 page image

Manual 2100-511Page 20 of 27CHECKING TEMPERATURE SENSOROUTSIDE UNIT CIRCUIT1. Disconnect temperature sensor from board and fromoutdoor coil.2. Use an ohmmeter and measure the resistance of thesensor. Also use ohmmeter to check for short oropen.3. Check resistance reading to chart of resistance. Usesensor ambient temperature. (Tolerance of part is± 10%.)4. If sensor resistance reads very low, then sensor isshorted and will not allow proper operation of theheat pump control.5. If sensor is out of tolerance, shorted, open or readsvery low ohms then it should be replaced.F R F R F R F R0.52-0.42-0.32-0.22-0.12-0.02-0.91-0.81-0.71-0.61-0.51-0.41-0.31-0.21-0.11-0.01-0.9-0.8-0.7-0.6-0.5-0.4-0.3-0.2-0.1-0.00.10.20.30.40.50.60.70.80.90.010.110.2117869199009158538181377198217178456140995192545155394147344167593165943160503191262198022180181127241157501101070147530106200146079189398001993188173589962812108236770325701927076077058681466993469442656506547850.310.410.510.610.710.810.910.020.120.220.320.420.520.620.720.820.920.030.130.230.330.430.530.630.730.830.930.040.140.240.340.440.540.640.740.840.940.0558965482550463515025415058209409574002645584445534592247701489893757832567338563845535454347533436233271304803689927519255382775723286229062383526964203042483328572205122165129890253402698910.350.250.350.450.550.650.750.850.950.060.160.260.360.460.560.660.760.860.960.070.170.270.370.470.570.670.770.870.970.080.180.280.380.480.580.680.780.88473917688157381989714347148961745612216101751013511294144541771410283147431731310182129421381213881119511703111301126701105017420100001067962599929770926883568944805287508968768670.980.090.190.290.390.490.590.690.790.890.990.0010.1010.2010.3010.4010.5010.6010.7010.8010.9010.0110.1110.2110.3110.4110.5110.6110.7110.8110.9110.0210.1210.2210.3210.421705743375617000704863866135638369326890616957285796507556445623580254905289437847674366426544644763447242814390460041293838375738763106362532543TEMPERATURE F VS. RESISTANCE R OF TEMPERATURE SENSOR