Mitsubishi Electric PCA-RP50GA Service Manual page 30

<Thermistor Characteristic graph>
Thermistor for
lower temperature
Thermistor R =15kΩ ± 3%
0
Fixed number of B=3480 ± 2%
Rt=15exp { 3480(
273+t
0: 15kΩ
10: 9.6kΩ
20: 6.3kΩ
25: 5.4kΩ
30: 4.3kΩ
40: 3.0kΩ
9-6.TEST POINT DIAGRAM
9-6-1. Power board
PCA-RP50GA PCH-P50GAH PCA-RP50GA2
PCA-RP60GA PCH-P60GAH
PCA-RP71GA PCH-P71GAH
PCA-RP100GA PCH-P100GAH
PCA-RP125GA PCH-P125GAH
PCA-RP140GA PCH-P140GAH
Room temperature thermistor(TH1)
Pipe temperature thermistor(TH2)
Condenser/evaporator temperature
thermistor(TH5)
1
1
) }
273
< Thermistor for lower temperature >
50
40
30
20
10
0
-20 -10 0
Temperature (:)
CN2S
Connect to the indoor controller board (CN2D)
Between 1 1 to 3 3 12.6-13.7V DC (Pin1 1 (+))
CNSK
Connect to the indoor controller board
(CNDK)
1 1 to 3 3 220-240V AC
Between
30
10 20 30 40 50