Mitsubishi Heavy Industries FDE112KXE6A, Service Manual, Page: 85 / 218

Error code
Remote controller:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
–
83
–
E38
E38
Outdoor air temperature
thermistor 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
thermistor connected
properly?
Are the
characteristics of
thermistor
OK?*1
*1
Check several times to prove any poor connection
Temperature-resistance characteristics of
outdoor air temperature thermistor (Tho-A)
Save data for 30 minutes before stopping in Mente PC
YES
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 thermistor 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 thermistor
(Tho-A).
Replace outdoor 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 thermistor harness or
the internal wire of sensing
section (Check the molded
section as well)
• Disconnection of thermistor
harness connection (connector)
• Outdoor control PCB anomaly
Note: