6 - 29
5. Inspection and Characteristics of Parts
2WAY SYSTEM
Trouble Diagnosis
6
6. Inspection and Characteristics of Parts
2WAY SYSTEM
Trouble Diagnosis
U - V
8.8
8HP
10HP
12HP
14HP
16HP
U - W
Resistance
(at 20°C)
Outdoor Unit Type
DMSBG75SY
unit : ohm
8.8
V - W
8.8
18HP
20HP
Compressor
Type
5JD650ZCA22
unit : ohm
0.678
0.700
0.691
Resistance
(at 20°C)
(6) Coil Resistance of Outdoor Unit Fan Motor
(7) Coil Resistance of Compressor Motor
(8) Characteristics of Sensor
Resistor (kΩ
)
Resistor (kΩ
)
●
Outdoor air temp. sensor (TO)
●
Compressor intake temp.
sensor (SCT)
Temperature(
°C
)
Temperature(
°C
)
●
Temp. sensor at refrigerant
gas outlet of dual-tube (SCG)
●
Outdoor coil liquid temp.
sensor (EXL1, EXL2)
●
Outdoor coil gas temp.
sensor (EXG1, EXG2)
40
35
30
25
20
15
10
5
0
-10
-15
-20
20
20
30
40
50
60
15
10
5
0
-5
8
7
6
5
4
3
2
1
0
Resistor (kΩ
)
Temperature(
°C
)
●
Compressor discharge gas temp. sensor (DISCH1, DISCH2)
0
90
80
70
60
50
40
30
20
10
0
40
60
80
100
120
140
160
180
200
20
U - V
U - W
V - W
2WAY VRF SYSTEM
Trouble Diagnosis
8. Thermister Characteristics Curve
(4) Indoor suction air (room) temp. sensor (TA)
Indoor discharge air temp. sensor (BL)
(5) Indoor coil temp. sensor (E1, E3)
40
35
30
25
20
15
10
5
0
-20
-15
-10
-5
0
5
10
15
20
8
7
6
5
4
3
2
1
0
20
30
40
50
60
10
55
50
45
40
35
30
25
20
15
10
9
8
7
6
5
4
3
1
2
Resistance
Resistance
Resistance
Temperature (˚C)
Temperature (˚C)
Temperature (˚C)
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