Panasonic S-22KA1E5 - Indoor Unit Freezing Abnormality (F31-08)

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19.12 Indoor Unit Freezing Abnormality (F31-08)
Malfunction Decision Conditions
• During operation of cooling, and when outdoor unit receive indoor unit freezing abnormal signal (indoor pipe
temperature < 0°C) from thermostat OFF/standby indoor unit.
Malfunction Caused
• Faulty sensor.
• Faulty indoor unit expansion valve.
• Faulty indoor unit PCB (main).
Abnormality Judgment
• Continue 3 times in 45 minutes.
Troubleshooting