Error code
Remote control:
7-segment display:
LED
Green
Red
Indoor
Outdoor
Content
'14 • KX-SM-221
E39
E39
Discharge pipe temperature
thermistor anomaly (Tho-D)
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? *3
*3
Check several times to prove any poor connection
Temperature-resistance characteristics of discharge
pipe temperature thermistor (Tho-D)
Save data for 30 minutes before stopping in Mente PC.
YES
NO
NO
YES
Temperature (°C)
Temperature thermistor
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 thermistor
(Tho-D).
Replace outdoor control
PCB.
2. Error detection method
Detection of anomalously low
temperature (resistance) of
Tho-D.
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 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:
E39
-
99
-
