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Canceling the Panel lock function
Press 
while you press and hold BACK and ENTER with the unit in standby mode.
while you press and hold BACK and ENTER with the unit in standby mode.Use 
to select “FP LOCK 
Off”.
to select “FP LOCK Off”.( The currently set mode.)
Press ENTER to enter the setting.
The Panel lock function is canceled.
Even when the Panel lock function is set, you can operate the unit using the remote control unit.