Panasonic WH-ADF0309J3E5CM Service Manual page 161

2. Mount to the wall.
There are 2 types of wall-mounting methods: Exposed type and Embedded type.
Attention
Mounting the bottom case

Tighten the screws securely until the screw heads touch the bottom case.
(Otherwise, loose screw heads may hit the PCB and cause malfunction when mounting the top case.)

Do not over-tighten the screws.
(The bottom case may be deformed, resulting in the unit becoming detached from the surface it is fixed to.)
Connection to the remote controller terminal board

Depress the push button using a round bar or finger, insert the remote control wiring securely from the wiring
insertion slot and release the push button.

Pull the remote control wiring lightly, and confirm it is secured.

There is the danger of shorting if copper wire is exposed. Make sure the wire is properly inserted.
12.2.3.4 Exposed Type
A protective film is attached on the Control panel.
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