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14.4.17 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