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16.4.21 F91 (Refrigeration Cycle Abnormality)
Malfunction Decision Conditions
During cooling, compressor frequency = Fcmax.
During cooling and heating operation, running current: 0.65A < I < 1.65A.
During cooling, indoor intake - indoor pipe < 39.2°F.
Malfunction Caused
Refrigerant shortage (refrigerant leakage)
Poor compression performance of compressor.
2/3 way valve closed.
Detection error due to faulty indoor intake air or indoor pipe temperature sensors.
Troubleshooting