Panasonic VL-VC3900BX Operation Instruction Manual page 8

11.Password
The user can set the password to enter the system setting,
where the password is 6-bit digits.
12.Language
The user can set the outdoor unit language type.
13.A key to get
In this function, the user can set the equipment identifier and
the property center (guard station) number
14.Reset all settings
The user can reset the equipment parameters to the factory
state (including network, address, card and other information)
through the「Reset all settings」function.
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