'17 • KX-T-259
Error code
Remote control:
LED
Green
Red
Indoor
Outdoor
Content
E7
Indoor return air
temperature thermistor anomaly (Thi-A)
Keeps flashing 1-time flash
Keeps flashing
Stays OFF
1. Applicable model
5. Troubleshooting
All models
Diagnosis
Countermeasure
Is
the connector of
thermistor connected
properly ?
Regarding the characteristics of
the thermistor, see the following chart.
Temperature-resistance characteristics of indoor
return air temperature thermistor (Thi-A)
Are
the characteristics
of thermistor OK?
*1
NO
NO
YES
YES
*1 Check several times to prove any poor connection
15
10
5
0
10
30
40
20
50
Temperature thermistor resistance (k
Ω
)
Temperature (°C)
5kΩ at 25
°C
Insert the connector
securely.
Replace thermistor
(Thi-A).
Replace indoor unit control
PCB.
2. Error detection method
Detection of anomalously low
temperature (resistance) of
Thi-A.
3. Condition of error displayed
• If -20°C or lower is
detected for 5 seconds
continuously, compressor
stops. After 3-minutes delay
the compressor is restarted
automatically, but if this
anomaly occurs again within
60 minutes after the initial
detection.
• Or detected for 5 seconds
continuously.
4. Presumable cause
• Anomalous connection of
indoor return air temperature
thermistor
• Indoor return air temperature
thermistor anomaly
• Indoor unit control PCB
anomaly
Note:
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