Panasonic CS-E24MKES Service Manual page 81

15.5.21. F11 (4-way valve Abnormality)
Malfunction Decision Conditions
• When heating operation, when indoor pipe temperature is below 10 C.
• When cooling operation, when indoor pipe temperature is above 45 C.
Malfunction Caused
• Connector in poor contact.
• Faulty sensor.
• Faulty outdoor unit PCB.
• 4-way valve defective.
Troubleshooting
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