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The height of the ceiling refers to the distance between the ceiling and the roof, and the applicable area refers to the heating area.
Electrical appliances are generally broken. If you don't know how to get it yourself, it's better to buy a local brand, at least he has after-sales service.
If it is an integrated bath bomb, pick the corner of the bath bomb mask, and pull it down. If it is a non-integrated bath bomb, you need to find the position of the circlip or dark screw. 6383
The top should be 30 cm, the hole of the bath bomb, the ordinary bath bomb 30x30 cm, the integrated ceiling, 30x60 cm.
Turn off the power first, open the control panel, check whether the wiring of the control panel is loose and fall off, the wiring of the control panel is normal, check the wiring position of the bath bomb itself, check the line connection, and if you can't operate it, find the property department or someone who understands circuit maintenance to check it.
Yes, there will be an installation fee at the time of installation.