Mitsubishi Electric SRK71VNPWZR, Руководство по обслуживанию

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94
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'19 • PAC-SM-312
E28
Remote control
temperature sensor anomaly
Keeps flashing Stays OFF
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
NO
YES
NO
YES
Is the remote
control temperature sensor
connected properly?
Are the
characteristics of
remote control temperature
sensor OK?
Is the sensor wire
OK?
Resistance-temperature characteristics of remote control temperature sensor (Thc)
0
1
2
4
6
8
10
12
Temperature (°C)
65
62
59
53
48
44
40
36
14
16
18
20
22
24
26
28
33
30
27
25
23
21
19
18
30
32
34
36
38
40
42
44
16
15
14
13
12
11
9.9
9.2
46
48
50
52
54
56
58
60
8.5
7.8
7.3
6.7
6.3
5.8
5.4
5.0
Resistance value (k
Ω
) Temperature (°C) Resistance value (k
Ω
)
Correct.
Defective remote control
temperature sensor
➞
Replace.
Defective remote control
PCB
➞
Replace.
(Defective remote control
temperature sensor input
circuit)
2. Error detection method
Detection of anomalously low
temperature (resistance) of
remote control temperature
sensor (Thc)
3. Condition of Error displayed
When the temperature sensor
detects -50°C or lower for
5 seconds continuously,
the compressor stops. After
3-minutes delay, the compressor
starts again automatically, but
if this error occurs again within
60 minutes after the initial
detection.
4. Presumable cause
• Faulty connection of remote
control temperature sensor
• Defective remote control
temperature sensor
• Defective remote control PCB
Note:
After 10 seconds has passed since remote control sensor was switched from valid to invalid, E28 will not be displayed even if the sensor
harness is disconnected. At same time the temperature sensor, which is effective, is switched from remote control sensor to indoor return
air temperature sensor. Even though the remote control sensor is set to be Effective, the return air temperature displayed on remote control
for checking still shows the value detected by indoor return air temperature sensor, not by remote control temperature sensor.
NO
YES
NO
YES
Is the remote
control temperature sensor
connected properly?
Are the
characteristics of
remote control temperature
sensor OK?
Is the sensor wire
OK?
Resistance-temperature characteristics of remote control temperature sensor (Thc)
0
1
2
4
6
8
10
12
Temperature (°C)
65
62
59
53
48
44
40
36
14
16
18
20
22
24
26
28
33
30
27
25
23
21
19
18
30
32
34
36
38
40
42
44
16
15
14
13
12
11
9.9
9.2
46
48
50
52
54
56
58
60
8.5
7.8
7.3
6.7
6.3
5.8
5.4
5.0
Resistance value (k
Ω
) Temperature (°C) Resistance value (k
Ω
)
Error code
Remote control:
LED Green Red
Indoor
Content