Mitsubishi Electric CITY MULTI PLFY-P15VFM-E Technical & Service Manual page 21

8-2-1. Thermistor Characteristic Graph
Thermistor for
lower temperature
Thermistor R =15 kΩ ± 3%
0
Fixed number of B=3480 ± 2%
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
8-2-2. Linear Expansion Valve
1 Operation summary of the linear expansion valve
• Linear expansion valves open/close through the use of a stepping motor after receiving the pulse signal from the indoor
controller board.
• Valve position can be changed in proportion to the number of pulse signals.
<Connection between the indoor controller board and the linear expansion valve>
Linear expansion valve
[4
M
[2
[1 [3
5
1
Red
White
Orange
Note : Since the number of the connector at the controller board side and the relay connector are different, follow the color of
the lead wire.
OCH601
Thermistor (TH21)
(Room temperature detection)
Thermistor (TH22)
(Pipe temperature detection/Liquid)
Thermistor (TH23)
(Pipe temperature detection/Gas)
1
1
) }
273
1
) }
273
4 Blue
[4
Brown
6
[3
Yellow
2
[2
3
[1
50
40
30
20
10
0
10
Controller board
Brown
Red
Blue
Orange
Yellow
White
Connector(CN60)
21
< Thermistor for lower temperature >
-20 -10 0 10 20 30 40 50
Temperature (:)
< Thermistor for drain sensor >
9
8
7
6
5
4
3
2
1
0
-20 0 20 40 60 80
Temperature (:)
DC12V
6
5
Drive circuit
[4
4
[3
3
[2
2
[1
1