31
OCH660A
9-6. HOW TO CHECK THE PARTS
PKA-M35HA PKA-M50HA PKA-M35HAL PKA-M50HAL
PKA-M35HA-ER PKA-M50HA-ER PKA-M35HAL-ER PKA-M50HAL-ER
2
RD
4
YE
1
BN
OG
3
GN
5
Connect pin No.
M
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 (TH1)
Pipe temperature thermistor/liquid (TH2)
Condenser/evaporator temperature ther-
mistor (TH5)
Thermistor R
0
=15k
"
± 3%
Fixed number of B=3480
± 2%
Rt=15exp { 3480( ) }
0
:
15 k
"
10
:
9.6 k
"
20
:
6.3 k
"
25
:
5.4 k
"
30
:
4.3 k
"
40
:
3.0 k
"
Thermistor for
lower temperature
1
273+t
1
273
9-6-1. Thermistor
Parts name
Check points
Room temperature
thermistor (TH1)
Pipe temperature
thermistor/liquid(TH2)
Condenser/evaporator
temperature thermistor (TH5)
Disconnect the connector then measure the resistance with a tester.
Refer to “9-6-1. Thermistor”.
Vane motor (MV)
Measure the resistance between the terminals using a tester. (Coil temperature 25
:
)
Normal
1
-
2
Brown-Red
1
-
3
Brown-Orange
1
-
4
Brown-Yellow
1
-
5
Brown-Green
350" ± 7%
Fan motor (MF)
Refer to “9-6-2. DC Fan motor (fan motor/indoor controller circuit board)”.
