York HP Series Service Manual page 121

16.4.21 Auto-lifting panel malfunction(F8)
Malfunction decision conditions
Possible causes
Indoor PCB does not get the right close position from the
PCB of auto lifting-panel when the panel motor stops
● Wiring mistake between indoor PCB and
auto-lifting panel
● Faulty PCB of auto-lifting panel
● Faulty indoor PCB
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