54
55
55
9. How to check the parts PKH-2GKLA
Room temperature
thermistor
(RT1)
Pipe temperature
thermistor (RT2)
Disconnect the connector, then measure the resistance with a tester.
(Surrounding temperature 10°C~30°C)
(Refer to the thermistor)
Normal
4.3k
'
~9.6k
'
Abnormal
Open or short
Fan motor (MF)
Measure the resistance between the terminals with a tester.
Motor terminal
or
Relay connector
Normal
PKH-2GKLA
Abnormal
Red-Black
141.2
'
Open or short
White-Black
131.5
'
1
3
3
2
5
1
Red
White
C
Black
Relay connector
Protector
Parts name
Check points
0
10
20
30
40
50
-20 -10
0
10 20
30
40
50
< Thermistor for lower temperature >
Temperature (
)
Resistance (k
)
<Thermistor Characteristic graph>
Room temperature thermistor(RT1)
Pipe temperature thermistor(RT2)
Thermistor R
0
=15k
'
± 3%
Fixed number of B=3480
± 2%
Rt=15exp { 3480( ) }
0
:
15k
'
10
:
9.6k
'
20
:
6.3k
'
25
:
5.2k
'
30
:
4.3k
'
40
:
3.0k
'
Thermistor for
lower temperature
1
273+t
1
273
Vane motor (MV)
Measure the resistance between the terminals with a tester.
(Surrounding temperature 20°C~30°C)
Normal
186~214
'
Abnormal
Open or short
3 6 1
4
5
2
M
Pink
Connector
Red
Orange
Blue
Brown
Yellow
Brown-Yellow
Brown-Blue
Red-Orange
Red-Pink
OC231A
