Velleman VMB1TCW - Manual (Page 24)

Battery backup
To avoid losing the clock when a power failure occurs, a backup battery (3V Lithium CR2032) can be installed in the
battery holder at the back of the module.
To avoid premature depletion of the battery, only install it when permanent power is supplied to the Velbus system.
The temperature controller can display a message when the battery needs replacement.
The battery voltage watchdog must be enabled through the configuration menu.
1. Press and hold the ‘Menu’ button for ±4 seconds to
open the extended menu.
2. If necessary scroll through the extended menu using
the ↑ or ↓ button until the ‘Configuration’ item
appears
3. Select the configuration menu with the
→ button.
4. Scroll through the configuration menu using the ↑ or
↓ button until the ‘Battery backup’ item appears.
Location

↑
↓ Menu
→
Mode
←
Configuration
Location

↑
↓ Menu
→
Mode
←
Replace battery
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Location

↑
↓ Menu
→
Mode
←
Configuration
Location

↑
↓ Menu
→
Mode
←
Battery backup
Location

↑
↓ Menu
→
Mode
←
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