Panasonic CS-XE9PKUA - Manual (Page 73)

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15.4.19 F17 (Indoor Standby Units Freezing Abnormality)
Malfunction Decision Conditions
š When the different between indoor intake air temperature and indoor pipe temperature is above 50°F (10°C) or
indoor pipe temperature is below 30.2°F (-1.0°C).
Remark:
When the indoor standby unit is freezing, the outdoor unit transfers F17 error code to the corresponding indoor
unit and H39 to other indoor unit(s).
Malfunction Caused
š Wrong wiring connection
š Faulty sensor
š Faulty expansion valve
Troubleshooting