Mitsubishi Electric TRANE CITY MULTI TPKFYP004LM140A Technical & Service Manual page 28

9-1-1. Thermistor
<Thermistor characteristic graph>
Room temperature detection thermistor (TH21)
Thermistor for
Pipe temperature detection thermistor/liquid (TH22)
lower temperature
Pipe temperature detection thermistor/gas (TH23)
Thermistor R =15 k" ± 3%
0
Fixed number of B=3480 ± 2%
Rt=15exp { 3480(
273+(t-32)/1.8
30_F 15.8 k"
50_F 9.6 k"
70_F 6.0 k"
80_F 4.8 k"
90_F 3.9 k"
100_F 3.2 k"
9-1-2. Linear expansion valve
1 Operation summary of the linear expansion valve
• Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the indoor controller board.
• Valve position can be changed in proportion to the number of pulse signal.
<Connection between the indoor controller board and the linear expansion valve>
Linear expansion valve
Blue
4
Brown
M 6
Yellow
2
5
1
3
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.
OCHT715A
1 1
) }
273
[4
[3
[2
[1
50
40
30
20
10
0
-20
Controller board
6
Brown
5
Red
4
Blue
3
Orange
2
Yellow
1
White
Connector(CN60)
28
< Thermistor for lower temperature >
0 20 40 60 80 100 120
Temperature (°F)
12 V DC
Drive circuit
[4
[3
[2
[1