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2 operator diagnostics, Constant tone is heard when power is applied, Constant tone is heard – DoorKing 9220 User Manual

Page 46: Short tone is heard every five seconds, 3 trouble shooting

2 operator diagnostics, Constant tone is heard when power is applied, Constant tone is heard | Short tone is heard every five seconds, 3 trouble shooting | DoorKing 9220 User Manual | Page 46 / 57 2 operator diagnostics, Constant tone is heard when power is applied, Constant tone is heard | Short tone is heard every five seconds, 3 trouble shooting | DoorKing 9220 User Manual | Page 46 / 57
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