Service manual
38
3. How to check the parts
PK-1.6FLA
3
, PK-2FLA
3
, PK-2.5FLA
2/3/4
, PK-3FLA
2/3/4/5
, PK-4FLSA
2/3/4
Room temperature
thermistor (RT1)
Pipe temperature
thermistor (RT2)
Transformer
Fan motor
Disconnect the connector, then measure the resistance using a tester.
(Surrounding temperature 10°C~30°C)
Disconnect the connector and measure the resistance using a tester.
Measure the resistance between the terminals using a tester.
Normal
4.3k'~9.6k'
Abnormal
Open or short
CNT(1)-(3)
Normal
WHT. Approx. 135'
CN4T(1)-(2)
BRN. Approx. 0.5~2.0'
Abnormal
Open or short
Motor terminal
or
Relay connector
Normal
PK-
2.5FLD
2/3/4
, 3FLD
2/3/4/5
Abnormal
Red-White
99.5'i10%
Open or short
White-Black
103.5'i10%
1
2
3
1
2
3
4
CNT T CN4T
BRN
RED
WHT
YLW
1
1
3
3
5
5
Red
White
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 R0=15k' ±3%
Fixed number of B=3480k' ±2%
Rt=15exp { 3480( ) }
0: 15k'
10: 9.6k'
20: 6.3k'
25: 5.4k'
30: 4.3k'
40: 3.0k'
Thermistor for
lower temperature
1
273+t
1
273
CN4T(3)-(4)
RED. Approx. 1.0~2.0'
4FLSA2/3/4
62.6'i10%
74.0'i10%
Vane motor
Measure the resistance between the terminals using 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
1.6FLA3, 2FLA3
114.5'i10%
118.2'i10%
15k'
PK-
1.6FLA3
PK-
2FLA3
PK-2.5FLD
2/3/4
, PK-3FLD
2/3/4/5
,
PK-
4FLSA2/3/4
Thermal protector
OFF : 130i5˚C
ON : 80i20˚C
OFF : 125i5˚C
ON : 125i5˚C
OC129A-2.qxp 01.10.1 7:33 PM Page 38