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< Thermistor for lower temperature >
Temperature
Resistance (k")
:
-4 -14 32 50 68 86
104
122
˚F
10-6.TEST POINT DIAGRAM
10-6-1. Power board
PCA-A24GA PCA-A30GA PCA-A36GA PCA-A42GA
PCA-A24GA1 PCA-A30GA1 PCA-A36GA1 PCA-A42GA1
CNSK
Connect to the indoor controller board
(CNDK)
Between 1 to 3 208/230V AC
CN2S
Connect to the indoor controller board (CN2D)
Between 1 to 3 12.6-13.7V DC (Pin1 (+))
<Thermistor Characteristic graph>
Room temperature thermistor(TH1)
Pipe temperature thermistor(TH2)
Condenser/evaporator temperature
thermistor(TH5)
Thermistor R0=15kΩ ±3%
Fixed number of B=3480 ± 2%
t(:):Rt=15exp { 3480( ) }
T(˚F):Rt=15exp { 3480( ) }
0: (32˚F) 15kΩ
10: (50˚F) 9.6kΩ
20: (68˚F) 6.3kΩ
25: (77˚F) 5.4kΩ
30: (86˚F) 4.3kΩ
40:(104˚F) 3.0kΩ
1
273+t
1
273
1
273+
1
273
T-32
1.8
Thermistor for
lower temperature
OC368B--1.qxp 07.6.20 1:01 PM Page 23