-
41
-
Current cut
[Open phase on compressor output
terminal, compressor lock]
(7)
Inspection procedures corresponding to detail of trouble
Sensor error
[Broken sensor wire,
connector poor connection]
(Shortcircuit)
(Broken wire)
Is connector connection good?
YES
YES
NO
NO
Replace PCB.
Correct connection.
Replace sensor.
Is sensor resistance value good?
◆
Sensor temperature characteristics
(Room temp., indoor unit heat exchanger
temp., outdoor unit heat exchanger
temp., outdoor air temp.)
Temperature (˚C)
Resistance (k
Ω
)
30
25
20
15
10
5
30
20
10
40
50
60
70
0
–10
Temperature (˚C)
Resistance (k
Ω
)
Temperature (˚C)
Resistance (k
Ω
)
0
164
70
8.7
5
127
75
7.3
10
99
80
6.2
15
78
85
5.3
20
62
90
4.5
25
50
95
3.9
30
40
100
3.3
35
32
105
2.9
40
26
110
2.5
45
21
115
2.2
50
17
120
1.9
55
14
125
1.6
60
12
130
1.4
65
10
135
1.3
◆
Discharge pipe sensor temperature characteristics
YES
YES
NO
NO
YES
NO
¡
Check compressor wiring visually.
¡
Check insulation resistance. (1 M
Ω
or over)
¡
Check coil wire resistance. (Few
Ω
)
Does current cut operate when
operating inverter with compressor
wire disconnected?
Is output voltage applied to all 3
phases of power transistor?
Is there any shortcircuit?
Inspect compressor.
Defective inverter
Defective inverter
Secure space for suction
and blow out.
If check results are normal,
compressor is locked.