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Question: Lock/Unlock function settings for HRF-IV550MD(G)

Answer:

 

When the display panel is unlocked, press “Lock/Unlock” button for 3 seconds, with the sound of buzzer and the light of “Lock icon”, the display panel will be locked. When the display panel is locked, press “Lock/Unlock” button for 3 seconds, with the sound of buzzer and the going out of “Lock icon”, the display panel will be unlock.

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