WH-MXC16G9E8 - Panasonic Air Conditioner Service Manual (repair manual). Page 126

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126 
16.5.34  Outdoor Defrost Temperature Sensor Abnormality (F43) 
 
Malfunction Decision Conditions: 
During startup and operation of cooling and heating, the temperatures detected by the outdoor defrost 
temperature sensor are used to determine sensor error. 
 
Malfunction Caused: 
1.  Faulty connector connection. 
2.  Faulty sensor. 
3.  Faulty outdoor unit PCB (main). 
 
Abnormality Judgment: 
Continue for 5 seconds. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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