E37
Outdoor heat exchanger
temperature sensor anomaly
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
Is the
outdoor heat
exchanger temperature
sensor connector
connected
properly?
YES
Are the
characteristics of
outdoor heat exchanger
temperature
sensor
OK?
NO
For the characteristics of outdoor heat exchanger
temperature sensor, see the following graph.
YES
Temperature-resistance characteristics
Temperature sensor resistance (kΩ)
Temperature (°C)
15
10
5
010304020 50
5kΩ at 25°C
NO
(Broken wire)
(Short-circuit)
Correct connector.
Defective outdoor heat
exchanger temperature
sensor
➞
Replace.
Defective outdoor unit
PCB
➞
Replace.
(Defective outdoor heat
exchanger temperature
sensor input circuit)
2. Error detection method
Detection of anomalously low
temperature (resistance) on
the outdoor heat exchanger
temperature sensor
3 .
Condition of error displayed
•
When the temperature sensor
detects -55 °C or lower for 5
seconds continuously within
2 minutes to 2 minutes 20
seconds after the compressor
ON, the compressor stops. After
3-minute delay, the compressor
starts again automatically, but
if this anomalous temperature
is detected 3 times within 40
minutes.
• When -55 °C or lower is
detected for 5 seconds
continuously within 20
seconds after power ON
4. Presumable cause
• Defective outdoor unit PCB
• Broken sensor harness or
temperature sensing section
• Disconnected wire connection
(connector)
Note:
Error code
Remote control:
LED Green Red
Content
Indoor
Stays OFF
Keeps flashing
'22 • PAC-SM-412
-
83
-
To Next Page
Loading...
