11-8. Outdoor Unit
Red
White Black
Red
White Black
No.
1
2
3
5
Part name
Compressor
(Model : DX270A2T-20L)
Outdoor fan motor
(Model : WDF-340-A100-1)
Compressor thermo. Bimetal type
(Model : CS-12AL)
Checking procedure
Measure the resistance value of each winding by using the tester.
Under 20°C
Measure the resistance value of winding by using the tester.
Check conduction by using the tester.
Disconnect the connector, and measure resistance value with the tester.
(Normal temperature)
Position
Red - White
White - Black
Black - Red
Resistance value
0.49 ± 0.03Ω
Position
Red - White
White - Black
Black - Red
Resistance value
17.3 ± 1.7Ω
Temperature
Sensor
TD (kΩ)
TO (kΩ)
TGa to TGe (kΩ)
10°C 20°C 25°C 40°C 50°C
105 64 51 27 18
20.6 12.6 10.0 5.1 3.4
20.0 12.5 10.0 5.3 3.6
4
High pres
s
ure s
witch
(Model : ACB-
1
U
B
177
W)
Check conduction by using the tester.
100
30
40
50
60
70
80
90
20
10
0
0102030 4050
Resistance value (kΩ)
Temperature (°C)
TD
TO
: Discharge temp. sensor
: Outdoor temp. sensor
TO,TGa to TGe
TD
[1] Sensor characteristic table
11-7. Inspection of the Main Parts
Outdoor temperature sensor (TO),
pipe temperature sensor
(TGa, TGb, TGc, TGd, TGe),
discharge temperature sensor (TD)
TGa to TGe : Gas side temp. sensor
Under 20°C
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