Mitsubishi KXZ Series - Page 240

Error code
Remote control:
LED Green Red
Indoor
Outdoor
Content
E7
7-segment display:
Indoor return air
temperature sensor anomaly (Thi-A)
Keeps ashing 1-time ash
Keeps ashing Stays OFF
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
Is
the connector of
temperature sensor
connected
properly ?
Regarding the characteristics of
the temperature sensor, see the following chart.
Temperature-resistance characteristics of indoor
return air temperature sensor (Thi-A)
Are
the characteristics
of temperature sensor OK?
*1
NO
NO
YES
YES
*1 Check several times to prove any poor connection
15
10
5
010304020 50
Temperature sensor resistance (kΩ)
Temperature (°C)
5kΩ at 25°C
Insert the connector
securely.
Replace temperature sensor
(Thi-A).
Replace indoor unit PCB.
2. Error detection method
Detection of anomalously low
temperature (resistance) of
Thi-A.
3 . Condition of error displayed
• When disconnection is
detected sontinuously for 5
seconds, or short circuit is
detected sontinuously for 5
seconds.
4. Presumable cause
• Anomalous connection of
indoor return air temperature
sensor
• Indoor return air temperature
sensor anomaly
• Indoor unit PCB anomaly
Note:
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238
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'20 • KX-T-373