Mitsubishi Electric Mr. SLIM PKA Series Service Manual page 26

9-6. HOW TO CHECK THE PARTS
PKA-M60KA2(-ER/-ET).TH
PKA-M60KAL2(-ER/-ET).TH
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 20:)
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"
TCH069A
PKA-M71KA2(-ER/-ET).TH
PKA-M71KAL2(-ER/-ET).TH
Normal Abnormal
4.3 to 9.6k" Open or short
Normal
1-2 1-3 1-4
Brown-Orange Brown-Yellow
250" ± 7%
Room temperature thermistor (TH1)
Pipe temperature thermistor/liquid (TH2)
Condenser/evaporator temperature ther-
mistor (TH5)
1
) }
273
PKA-M100KA2(-ER/-ET).TH
PKA-M100KAL2(-ER/-ET).TH
Check points
Refer to "9-6-1.Thermistor".
Abnormal
1-5
Brown-Green
Open or short
< Thermistor for lower temperature >
50
40
30
20
10
0
-20 -10 0
26
10 20 30 40 50
Temperature (:)