Panasonic CS-E9SD3UAW Service Manual page 83

15.5.12 H33 (Unspecified Voltage between Indoor and Outdoor)
Malfunction Decision Conditions

The supply power is detected for its requirement by the indoor/outdoor transmission.
Malfunction Caused

Wrong models interconnected.

Wrong indoor unit and outdoor unit PCBs used.

Indoor unit or outdoor unit PCB defective.
Troubleshooting
When abnormality indication starts again
Check indoor and outdoor units model number
Is the indoor and outdoor unit model number matched?
Check indoor and outdoor PCB part number and
compare if they matched part list.
Change for the specified indoor or outdoor unit PCB.
NO
YES
NO
For safety reason and to prevent
component breakdown, always switch
Caution
off the power before remove and
connect the component.
● Match the compatible model (follow specification)
● Replace the indoor and outdoor unit PCB.
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