Self-Diagnosis Method - Panasonic WH-SXC09H3E8 Service Manual

16.5

Self-diagnosis Method

16.5.1 Connection Capability Rank Abnormality (H12)
Malfunction Decision Conditions:
During startup operation of cooling and heating, the capability rank of indoor checked by the outdoor is used to
determine connection capability rank abnormality.
Malfunction Caused:
1 Wrong model interconnected.
2 Wrong indoor unit or outdoor unit PCB (main) used.
3 Faulty indoor unit or outdoor unit PCB (main).
Abnormality Judgment:
Continue for 90 seconds.
Troubleshooting:
Check the spare part numbers of
the indoor and outdoor unit PCBs
and compare with their Part Lists.
Check indoor and outdoor
units model number.
Is the indoor and outdoor
model number matched?
Yes
Matched compatibility?
Yes
No
Match the compatible
No
Change for specified indoor
or outdoor unit PCB (main).
Replace the indoor and
outdoor unit PCBs (main).
165
model.