Fujitsu AUXG45LRLB Service Instruction page 86

SERVICE PARTS INFORMATION 8
Thermistor
Check Point : Check Thermistor resistance value
Remove connector and check Thermistor resistance value.
Temperature
[°C]
Thermistor A
- 20 ---
- 10 ---
- 5 ---
0 168.6
5 129.8
10 100.9
15 79.1
20 62.6
25 49.8
30 40.0
40 26.3
50 17.8
60 12.3
70 8.7
80 6.3
90 4.6
100 3.4
110
2.6
120 2.0
Discharge temp. TH
Applicable
Compressor temp. TH
Thermistors
SERVICE PARTS INFORMATION 9
Pressure Sensor
Check Point : Check Voltage from Main PCB
With the connector connected to the PCB, measure the voltage between CN91:3-4
of the Main PCB.
DC
Characteristics of pressure sensor
4.5
2.5
0.5
0
2.5
Pressure [MPa]
Resistance Value [ k ]
Thermistor B
---
27.8
21.0
16.1
12.4
9.6
7.6
6.0
4.8
3.8
2.5
1.7
1.2
---
---
---
---
---
---
Heat exchanger. TH Outdoor temp. TH
CN91
RED
1 1
2 2 PRESSURE
WHITE
P S
3 3 SENSOR
BLACK
4 4 (HIGH)
5.0
Thermistor C Thermistor D
---
105.4
27.4
58.2
20.7
44.0
15.8
33.6
12.2
25.9
9.5
20.2
7.5
15.8
5.9
12.5
4.7
10.0
3.8
8.0
2.5
5.3
1.7
3.6
1.2
---
0.8
---
0.6
---
0.4
---
0.3
---
---
---
---
---
Heat sink temp. TH
02-48
DC