How To Check The Components - Mitsubishi PUMY-P60NKMU Technical & Service Manual

8-8. HOW TO CHECK THE COMPONENTS

<Thermistor feature chart>
Low temperature thermistors
• Thermistor <HIC pipe> (TH2)
• Thermistor <Outdoor pipe> (TH3)
• Thermistor <Low pressure saturated temperature> (TH6)
• Thermistor <Outdoor> (TH7)
Thermistor R0 = 15k' ± 3%
B constant = 3480 ± 2%
1
R =15exp{3480( –
t
273+t 273
0°C [32°F] 15k'
10°C [50°F] 9.6k'
20°C [68°F] 6.3k'
25°C [77°F] 5.2k'
High temperature thermistor
• Thermistor <Compressor> (TH4)
Thermistor R120 = 7.465k' ± 2%
B constant = 4057 ± 2%
1
R =7.465exp{4057(
t
273+t
20°C [68°F] 250k'
30°C [86°F] 160k'
40°C [104°F] 104k'
50°C [122°F] 70k'
60°C [140°F] 48k'
<HIGH PRESSURE SENSOR>
Vout (V)
4.5
2.5
0.5
2.5
<LOW PRESSURE SENSOR>
Vout (V)
3.5
2.5
0.5
0.85
OCH502C
1
)}
t : °C = (°F-32)/1.8
30°C [86°F] 4.3k'
40°C [104°F] 3.0k'
1
– )}
393
t : °C = (°F-32)/1.8
70°C [158°F] 34k'
80°C [176°F] 24k'
90°C [194°F] 17.5k'
100°C [212°F] 13.0k'
110°C [230°F] 9.8k'
Vout
- : 5V (DC)
5
- : Output Vout (DC)
PRESSURE
(MPa)
Vout
- : 5V (DC)
1.7
PRESSURE
- : Output Vout (DC)
(MPa)
50
40
30
20
10
0
-20 -10 0 10 20 30 40 50
-4 -14 32 50 68 86 104 122 (°F)
500
400
300
200
100
0
MULTI
CONTROLLER BOARD
5V DC
3
WHT
2
BLU
MICRO
PROCESSOR
1
BLK
GND
63HS
MULTI
CONTROLLER BOARD
5V DC
3
RED
2
WHT
MICRO
PROCESSOR
1
BLK
GND
63LS
88
( )
Temperature
50 75 100 120 (°C)
25
77 112 167 212 248 (°F)