Mitsubishi KXZ Series - Page 255

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253
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'20 • KX-T-373
Error code
Remote control:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
E38
E38
Outdoor air temperature
sensor anomaly (Tho-A)
Keeps flashing Stays Off
Keeps flashing 1 time flash
1. Applicable model
5. Troubleshooting
Outdoor unit
Diagnosis Countermeasure
Is the
connector of
sensor connected
properly?
Are the
characteristics of
sensor OK?*1
*1
Check several times to prove any poor connection.
Temperature-resistance characteristics of
Outdoor air temperature sensor (Tho-A)
Save data for 30 minutes before stopping in Mente PC
NO
NO
YES
Temperature (°C)
0
10
20
30
40
50
60
70
80
90
100
-20 -10 0 10 20
30 40 50
Temperature sensor resistance (kΩ)
Check and save the data of
operating condition.
Check the conditions whether
it occurs immediately after the
power on or during operation
or stopping.
Check the sensed value.
Compare the temperature
on Mente PC with actual
measured value.
Insert the connector
securely.
Replace sensor
(Tho-A).
Replace outdoor unit control
PCB.
2. Error detection method
Detection of anomalously low
temperature (resistance) of
Tho-A
3 . Condition of error displayed
• If -30°C or lower is detected for 5 seconds
continuously within 2 minutes to 2 minutes
20 seconds after the compressor ON, the
compressor stops. And after 3 minutes delay,
the compressor starts again automatically, but if
this anomalous temperature is detected 3 times
within 40 minutes after the initial detection.
• If -30°C or lower is detected for 5 seconds
continuously within 20 seconds after power ON.
4. Presumable cause
• Broken sensor harness or
the internal wire of sensing
section (Check the molded
section as well)
• Disconnection of sensor
harness connection
(connector)
• Outdoor unit control PCB
anomaly
Note:
YES
Error code
Remote control:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
E39
E39
Discharge pipe temperature
sensor anomaly (Tho-D1)
Keeps flashing Stays Off
Keeps flashing 1 time flash
1. Applicable model
5. Troubleshooting
Outdoor unit
Diagnosis Countermeasure
Is the
connector of
sensor connected
properly?
Are the
characteristics of
sensor OK? *3
*3
Check several times to prove any poor connection.
Temperature-resistance characteristics of
discharge pipe temperature sensor (Tho-D1)
Save data for 30 minutes before stopping in Mente PC
NO
NO
YES
Temperature (°C)
Temperature sensor
resistance (kΩ)
0
20
40
60
80
100
120
140
160
180
200
0 20 40 60 80 100 120 140 160
Check and save the data of
operating condition.
Check the conditions whether
it occurs immediately after the
power on or during operation
or stopping.
Check the sensed value.
Compare the temperature
on Mente PC with actual
measured value.
Insert the connector securely.
Replace sensor (Tho-D1).
Replace outdoor unit control
PCB.
2. Error detection method
Detection of anomalously low
temperature (resistance) of
Tho-D1
3 . Condition of error displayed
• If 3°C or lower is detected for
5 seconds continuously within
10 minutes to 10 minutes
20 seconds after the compressor
ON, the compressor stops. And after
3 minutes delay, the compressor
starts again automatically, but if this
anomalous temperature is detected
3 times within 40 minutes after the
initial detection.
4. Presumable cause
• Broken sensor harness or
the internal wire of sensing
section (Check the molded
section as well)
• Disconnection of sensor
harness connection
(connector)
• Outdoor unit control PCB
anomaly
Note:
YES