Panasonic CS-XE9PKUA - Manual (Page 56)

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15.4.2 H12 (Indoor/Outdoor Capacity Rank Mismatched)
Malfunction Decision Conditions
š During startup, error code appears when different types of indoor and outdoor units are interconnected.
Malfunction Caused
š Wrong models interconnected.
š Wrong indoor unit or outdoor unit PCBs mounted.
š Indoor unit or outdoor unit PCBs defective.
š Indoor-outdoor unit signal transmission error due to wrong wiring.
š Indoor-outdoor unit signal transmission error due to breaking of wire 3 in the connection wires between the indoor
and outdoor units.
Troubleshooting