Panasonic CS-S9MKQ Service Manual page 90

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