3.5 Maintenance

Cleaning

If used frequently, the intercom gets dirty. To clean it, use a piece of soft cloth moistened with clean water. We recommend you to obey the following principles while cleaning:

• Never use aggressive detergents (such as abrasives or strong disinfectants).
• Alcohol-based cleaners may be applied.
• Clean the device in dry weather in order to make waste water evaporate quickly.

Future Tag Replacement, Programming Changes

For necessary steps refer to the preceding subsections. Keep the following for future changes:

• This manual
• Unused transparent foil strips for button tags