Mitsubishi Electric City Multi PLFY Series Technical & Service Manual page 20

Parts name
Flow control valve
Disconnect the connector then measure the resistance between terminals with a tester.
(FCV)
CN8A
Refer to "8-1-2. Flow control valve".
Yellow
1
Orange
2
Red
3
Green
4
M
Blue
5
Purple-Brown
Purple
6
FCV
(Optional parts) White
7
Gray
8
8-1-1. Thermistor Characteristic Graph
Thermistor for
lower temperature
Thermistor R =15 kΩ ± 3%
0
Fixed number of B=3480 ± 2%
1
Rt=15exp { 3480(
273+t
0: 15 kΩ
10: 9.6 kΩ
20: 6.3 kΩ
25: 5.4 kΩ
30: 4.3 kΩ
40: 3.0 kΩ
Thermistor for
drain sensor
Thermistor R =6.0 kΩ ±5%
0
Fixed number of B=3390 ±2%
1
Rt=6exp { 3390(
273+t
0: 6.0 kΩ
10: 3.9 kΩ
20: 2.6 kΩ
25: 2.2 kΩ
30: 1.8 kΩ
40: 1.3 kΩ
60: 0.6 kΩ
OCH717
Normal
1-5 2-5 3-5
Orange-Brown Blue-Brown
55 Ω ± 5.6 Ω (at 25℃）
Thermistor (TH21)
(Room temperature detection)
Thermistor (TH22)
(Pipe temperature detection/ inlet)
Thermistor (TH23)
(Pipe temperature detection/ outlet)
1
) }
273
1
) }
273
Check points
Abnormal
4-5
Green-Brown
Open or short
< Thermistor for lower temperature >
50
40
30
20
10
0
10
9
8
7
6
5
4
3
2
1
0
20
-20 -10 0 10 20 30 40 50
Temperature (:)
< Thermistor for drain sensor >
-20 0 20 40 60 80
Temperature (:)