The indoor chime does not make sound when a guest rings the ADC-VDB750

How To
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If the ADC-VDB750 is not ringing the indoor chime when triggered, use the following steps to troubleshoot the behavior.

Verify the original chime and doorbell button function properly

Reconnect the original doorbell to the chime to test.

Verify the installation meets the power and wiring requirements

Power requirements

AC transformer 16-24 VAC, 10-40VA (16VAC, 10VA recommended)
DC transformer 15-24 VDC, 6-20W

Recommended wire gauge

18-20 gauge wire (AWG) is recommended for all video doorbell camera installations. 18-20 AWG provides the correct amount of resistance needed to power a video doorbell camera.

Gauges outside of these recommendations affect the resistance of the wire and may deliver incorrect power to the device.

Wiring the ADC-VDB750

  • Verify the power module’s gray wires are connected to the transformer and the ADC-VDB750. No polarity.
  • Verify the power module’s white wires are connected to the chime’s Front/Rear and Trans terminals (or to a 22 Ohm 5 Watt flameproof resistor with 5% tolerance for installations with mechanical chimes, if needed). Typically no polarity.
    • For digital chimes, if the indoor chime stops functioning properly after attaching the white wires, reverse the polarity of the wires and test again.
  • When installing the power module, verify the chime’s functionality is unobstructed (e.g., do not attach the power module to a mechanical chime between the striker plate and plunger).

Verify the correct Chime Type is selected

In the Alarm.com website:

  1. Log into the Customer Website.
  2. Click Video.
  3. Click Settings.
  4. Using the Video Device dropdown menu, select the desired video device.
  5. Click Video Device Info.
  6. Using the Chime Type dropdown menu, select the appropriate chime type.
  7. Click Save.

Verify Indoor Chime is enabled

In the Alarm.com website:

  1. Log into the Customer Website.
  2. Click Video.
  3. Click Settings.
  4. Using the Video Device dropdown menu, select the desired video device.
  5. Click Video Device Info.
  6. Click to select Indoor Chime.
  7. Click Save.

Reboot the ADC-VDB750

  1. Press and hold the VDB750 button down for 40-45 seconds until the LED starts flashing yellow then release.
  2. Wait for the device to reboot.

Factory reset the ADC-VDB750

  1. Press and hold the VDB750 button for 45-50 seconds until the LED starts flashing red and green then release.
  2. Wait for the device to reboot.
  3. Re-enroll the device.

Additional information on installation and use of the vdb750 can be found here: