Mitsubishi Electric CITY MULTI PLFY Series Technical & Service Manual page 19

Parts name
Flow control valve
Disconnect the connector then measure the resistance between terminals with a multimeter.
(FCV) CN8A
Refer to "8-1-2. Flow control valve".
Yellow
1
Orange
2
Red
3
Green
4
M
Blue
5
Purple-Brown
6
Purple
FCV
(Optional parts) White
7
Gray
8
9-1-1. Thermistor Characteristic Graph
thermistor (TH21)
Thermistor for
lower temperature
thermistor (TH22)
thermistor (TH23)
Thermistor R =15 k" ± 3%
0
Fixed number of B=3480 ± 2%
Rt=15exp { 3480(
273+(t-32)/1.8
30°F 15.8kΩ
50°F 9.6kΩ
70°F 6.0kΩ
80°F 4.8kΩ
90°F 3.9kΩ
100°F 3.2kΩ
TCH123
Normal
1-5 2-5
Orange-Brown Blue-Brown
55 Ω ± 5.6 Ω (at 77°F）
(Room temperature detection)
(Pipe temperature detection/ inlet)
(Pipe temperature detection/ outlet)
1 1
) }
273
Checkpoints
Abnormal
3-5 4-5
Green-Brown
Open or short
50
40
30
20
10
19
< Thermistor for lower temperature >
0
-20 0 20 40 60 80 100
Temperature (°F)
120