WH-MXC16G9E8 - Panasonic Air Conditioner Service Manual (repair manual). Page 119

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119 
16.5.27  Outdoor High Pressure Switch Abnormal (F27) 
 
Malfunction Decision Conditions: 
During compressor stop, and outdoor high pressure switch is remain opened. 
 
Malfunction Caused: 
1.  Faulty connector connection. 
2.  Faulty switch. 
3.  Faulty outdoor unit PCB (main). 
Abnormality Judgment: 
Continue for 1 minute. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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