Friedrich Kuhl Series 6000 BTU Window Air Conditioner Installation and Operation Manual - Manuel (Page 17)

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Control Panel Operation
The Lock Menu
This menu is used to lock the changing setting with a password.
This is the Lock Menu. See Figure 32.
The default is the off setting. Use the arrows to toggle between off and
on. See Figure 33.
Figure 32
MENU
Figure 33
MENU
Figure 34
MENU
Figure 35
MENU
This is LOCK on. See Figure 34.
Set the first digit of the password using the arrow buttons. Use the left-
most button to proceed to the next digit. See Figure 35.