Panasonic S-22KA1E5S Service Manual page 215

Ka1e5 series, ya1e5 series, ua1e5 series, na1e5 series, ma1e5 series,
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18.2.14 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
215

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