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Panasonic CS-MRE7MKE Service Manual page 71

Indoor unit outdoor unit
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17.4.19. F91 (Refrigeration Cycle Abnormality)
Malfunction Caused
• Faulty indoor intake air or pipe temperature sensor
• 2/3 way valve closed
• Refrigerant shortage (refrigerant leakage)
• Clogged expansion valve or strainer
• Faulty outdoor unit
• Poor compression of compressor
Troubleshooting
71
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