Mitsubishi Electric PUZ-A NHA Series Service Manual page 26

<Thermistor Characteristic graph>
Room temperature thermistor(TH1)
Thermistor for
Pipe temperature thermistor/liquid(TH2)
lower temperature
Condenser/evaporator temperature
thermistor(TH5)
Thermistor R =15k' ± 3%
0
Fixed number of B=3480 ± 2%
t(:):Rt=15exp { 3480(
273+t
T(˚F):Rt=15exp { 3480(
273+
0: (32˚F) 15k'
10: (50˚F) 9.6k'
20: (68˚F) 6.3k'
25: (77˚F) 5.4k'
30: (86˚F) 4.3k'
40:(104˚F) 3.0k'
Thermistor for
drain sensor
Thermistor R =6.0k' ±5%
0
Fixed number of B=3390 ±2%
t(:)Rt= 6 exp { 3390(
273+t
T(˚F):Rt=6exp { 3390(
273+
0: (32˚F) 6.0k'
10: (50˚F) 3.9k'
20: (68˚F) 2.6k'
25: (77˚F) 2.2k'
30: (86˚F) 1.8k'
40:(104˚F) 1.3k'
60:(140˚F) 0.6k'
1 1
) }
273
1 1
) }
T-32
273
1.8
1 1
) }
273
1
1
) }
T-32
273
1.8
<Thermistor for lower temperature>
50
40
30
20
10
0
-20 -10 0
-4 -14 32 50 68 86 104 122
< Thermistor for drain sensor >
10
9
8
7
6
5
4
3
2
1
0
-20
-4
26
10 20 30 40 50 :
°F
Temperature
0 20 40 60 80 :
°F
32 68 104 140 176
Temperature