-
177
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E38
Outdoor air temperature
thermistor anomaly
Keeps flashing
Stays OFF
Keeps flashing 1 time flash
1. Applicable model
5. Troubleshooting
All models
Diagnosis
Countermeasure
Is
the outdoor air
temperature thermistor connector
connected properly?
YES
Is the
characteristics of the
outdoor air temperature
thermistor
OK?
NO
For the characteristics of outdoor air
temperature thermistor, see the following graph.
YES
NO
0
5
10
15
20
25
30
35
0
10
20
30
40
50
Temperature-resistance characteristics
Temperature thermistor resistance (k
Ω
)
Temperature (°C)
(Broken wire)
(Shot circuit)
Correct connector.
Defective outdoor air
temperature thermistor
➞
Replace.
Defective outdoor control
PCB
➞
Replace.
(Defective outdoor air
temperature thermistor
input circuit)
2. Error detection method
Detection of anomalously
low temperature (resistance)
on outdoor air temperature
thermistor
3. Condition of Error displayed
• When the temperature thermistor
detects -45°C or lower for 5
seconds continuously within 2
minutes to 2 minutes 20 seconds
after the compressor ON, the
compressor stops. After 3-minutes
delay, the compressor starts again
automatically, but if this anomalous
temperature is detected 3 times
within 40 minutes.
• When -45°C or lower is detected for
5 seconds continuously within 20
second after compressor ON.
4. Presumable cause
• Defective outdoor control
PCB
• Broken thermistor harness or
temperature sensing section
(Check molding.)
• Disconnected wire connection
(connector)
Note:
Error code
Remote controller:
LED
Green
Red
Indoor
Outdoor
Content
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