63
<Thermistor feature chart>
Low temperature thermistors
•Thermistor (TH2) <Low pressure saturated temperature detection>
•Thermistor (TH5) <Pipe temperature detection / judging defrost>
•Thermistor (TH6) <Outdoor temperature detection>
Thermistor R0 = 15k
'
± 3%
B constant = 3480k
'
± 2%
R
t
=15exp{3480( 273+t
–
273 )}
0
:
15k
'
10
:
9.6k
'
20
:
6.3k
'
25
:
5.2k
'
30
:
4.3k
'
40
:
3.0k
'
1
1
0
10
20
30
40
50
-20 -10 0
10 20 30 40 50
Temperature (
:
)
Resistance (K
"
)
M
4
6
2
3
5
1
Blue
Brown
Yellow
Orange
Red
White
Expansion valve
(LEV(A), SLEV)
Parts name
Check points
Disconnect the connector then measure the resistance using a tester. (Surrounding temperature 10
:
~30
:
)
Disconnect the connector then measure the resistance using a tester. (Part wiring temperature 20
:
)
•Thermistor (TH1)
<Discharge temperature detection>
•Thermistor (TH2)
<Low pressure saturated
temperature detection>
•Thermistor (TH5)
<Pipe temperature
detection / judging defrost>
•Thermistor (TH6)
<Outdoor temperature detection>
•Thermistor (THHS A/B)
<Radiator panel>
PUMY-P125VMA
•Thermistor (THHS)
<IPM radiator panel
temperature thermistor
detection>
PUMY-P125YMA,YMA
1
Normal
160k
"
~410k
"
4.3k
"
~9.6k
"
TH1
TH2
TH5
TH6
Abnormal
Open or short
Measure the resistance between the terminals using a tester. (Part wiring temperature 20C
°
)
4-WAY COIL
(21S4)
Normal
1430
"
Normal
(1) - (5)
White - Red
(2) - (6)
Yellow - Brown
(3) - (5)
Orange - Red
(4) - (6)
Blue - Brown
Abnormal
Abnormal
150
"
±
10%
Open or short
Normal
1970
"
Abnormal
Open or short
Open or short
Measure the resistance between the terminals using a tester. (Part wiring temperature 20C
°
)
SOLENOID COIL
(SV1)
Measure the resistance between the terminals using a tester.
(Part wiring temperature 20C
°
)
FAN MOTOR (MF1,2)
Normal
107.5
"
±
10%
128.0
"
±
10%
Motor lead wire
Abnormal
Open or short
White — Blue
Blue — Red
Red
White
Blue
Orange
Protector
Opening and closing temperature of protector.
Open:
135
i
5
°
C (Fan motor OFF)
Close:
86
i
15
°
C (Fan motor ON)
THHS A/B
THHS
39k
"
~105k
"
9-7. HOW TO CHECK THE PARTS
PUMY-P125VMA PUMY-P125YMA PUMY-P125YMA
1
To be continued on the next page.
OC272A--3.qxp 03.9.4 11:10 AM Page 63
Summary of Contents for PUMY-P125VMA
Page 91: ......
