Mitsubishi Electric Mr.Slim PKA-M35HA Service Manual page 30

9-6. HOW TO CHECK THE PARTS
PKA-M35HA
PKA-M35HAL
Parts name
Room temperature Disconnect the connector then measure the resistance using a tester.
thermistor (TH1)
(At the ambient temperature 10 to 30:)
Pipe temperature
thermistor/liquid (TH2)
Condenser / Evaporator
temperature thermistor
(TH5)
Vane motor (MV) Measure the resistance between the terminals using a tester. (Coil temperature 25:)
Red
2
M
Yellow
4
Brown-Red
Brown
1
Orange
Green
Connect pin No. 5
3
Fan motor (MF)
Refer to "9-6-2. DC Fan motor (fan motor/indoor controller circuit board)".
9-6-1. Thermistor
<Thermistor Characteristic Graph>
Thermistor for
lower temperature
Thermistor R =15k" ± 3%
0
Fixed number of B=3480 ± 2%
1
Rt=15exp { 3480(
273+t
0: 15 k"
10: 9.6 k"
20: 6.3 k"
25: 5.4 k"
30: 4.3 k"
40: 3.0 k"
OCH660
PKA-M50HA
PKA-M50HAL
Normal Abnormal
4.3 to 9.6k" Open or short
Normal
1-2 1-3
Brown-Orange Brown-Yellow
350" ± 7%
Room temperature thermistor (TH1)
Pipe temperature thermistor/liquid (TH2)
Condenser/evaporator temperature ther-
mistor (TH5)
1
) }
273
Check points
Refer to "9-6-1. Thermistor".
1-4 1-5
Brown-Green
Open or short
30
Abnormal
< Thermistor for lower temperature >
50
40
30
20
10
0
-20 -10 0 10 20 30 40 50
Temperature (:)