31
Relay connector
Protector
OFF:125
$
5
ON :79
$
15
(A12/ 18GA(L) only)
Orange
Red
Pink
Yellow Brown Blue
M
OFF:130
$
5
ON :80
$
20
(A24/ 30/ 36FA(L) only)
1
1
2
2
3
3
Red
White
Black
Parts name
Check points
Measure the resistance between the terminals with a tester.
(Winding temperature 20
(68°F))
Fan motor (MF)
Abnormal
Open or short
Red–Black
White–Black
Motor terminal
or
Relay connector
PKA-A12, 18GA
(1)(2)
PKA-A12, 18GAL
(1)(2)
141.2
131.5
Normal
Open or short
Abnormal
Brown–Yellow
Brown–Blue
Red–Orange
Red–Pink
Connector
Normal
186~214
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20
(68°F)~30
(86°F))
Vane motor (MV)
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10
(50°F)~30
(86°F))
(Refer to Thermistor Characteristic graph.)
Room temperature
thermistor (TH1)
Pipe temperature
thermistor (TH2)
Condenser/evaporator
temperature thermistor
(TH5)
Normal
4.3k
~9.6k
Abnormal
Open or short
PKA-A24, 30FA
(1)(2)
PKA-A24, 30FAL
(1)(2)
107.4
97.7
PKA-A36FA
(1)(2)
PKA-A36FAL
(1)(2)
69.7
95.5
10-6. HOW TO CHECK THE PARTS
PKA-A12/ 18GA PKA-A24/ 30/ 36FA
PKA-A12/ 18GAL
PKA-A24/ 30/ 36FAL
PKA-A12/ 18GA
1
PKA-A24/ 30/ 36FA
1
PKA-A12/
18GAL
1
PKA-A24/ 30/ 36FAL
1
PKA-A12/ 18GA
2
PKA-A24/ 30/ 36FA
2
PKA-A12/
18GAL
2
PKA-A24/ 30/ 36FAL
2
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
-4 -14 32 50 68 86 104122
°F
Temperature
Resistance (k
)
<Thermistor characteristic graph>
Room temperature thermistor(TH1)
Pipe temperature thermistor(TH2)
Condenser/evaporator temperature
thermistor(TH5)
Thermistor R
0
=15k ± 3%
Fixed number of B=3480 ± 2%
t(
:
):Rt=15exp { 3480( ) }
T(
˚
F):Rt=15exp { 3480( ) }
0
:
(32
˚
F) 15k
10
:
(50
˚
F) 9.6k
20
:
(68
˚
F) 6.3k
25
:
(77
˚
F) 5.4k
30
:
(86
˚
F) 4.3k
40
:
(104
˚
F) 3.0k
1
273+t
1
273
1
273+
1
273
T-32
1.8
Thermistor for
lower temperature
