24
5
HOW TO CHECK THE PARTS
Parts name
Check points
Disconnect the connector then measure the resistance using a tester.
(Surrounding temperature 10
:
~30
:
)
Drain sensor
(Refer to below for a detail.)
(Refer to below for a detail.)
Room temperature
thermistor (TH1)
Pipe temperature
thermistor/ liguid (TH2)
Condenser/evaporator
temperature thermistor
(TH5)
1
2
3
Normal
4.3k
"
~9.6k
"
Abnormal
Open or short
Abnormal
Open or short
Normal
0.6k
"
~6.0k
"
Measure the resistance between the terminals using a tester.
Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(Surrounding temperature 0
:
~60
:
)
5-1. INDOOR UNIT
• Common parts
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(TH2)
Condenser/evaporator temperature
thermistor(TH5)
Thermistor R
0
=15k
Ω
± 3%
Fixed number of B=3480K ± 2%
Rt=15exp { 3480( ) }
0
:
15k
Ω
10
:
9.6k
Ω
20
:
6.3k
Ω
25
:
5.2k
Ω
30
:
4.3k
Ω
40
:
3.0k
Ω
Thermistor R
0
=6.0k
Ω
±5%
Fixed number of B=3390K ±2%
Rt=6exp { 3390( ) }
0
:
6.0k
Ω
10
:
3.9k
Ω
20
:
2.6k
Ω
25
:
2.2k
Ω
30
:
1.8k
Ω
40
:
1.3k
Ω
60
:
0.6k
Ω
Thermistor for
lower temperature
1
273+t
1
273
1
273+t
1
273
-20
0
20
40
60
80
< Thermistor for drain sensor >
Temperature (
:
)
0
1
2
3
4
5
6
7
8
9
10
Resistance (k
"
)
Drain sensor
OCT04A-1.qxp 04.9.29 9:14 AM Page 24
