Double-check that terminal 1 on the door phone goes to terminal 1 on the handset, and 2 goes to 2. Broken circuit loop or insufficient lock power.
This is the most overlooked section of any . If you are installing multiple monitors in the same building (e.g., 4 units per floor), you must set DIP switches to avoid crosstalk. commax dp-ra01 installation manual
| Problem | Likely Cause | Solution | |---------|--------------|----------| | No power (no LED) | +/- reversed or loose | Check terminal connections | | No video, but audio works | V terminal loose or camera fault | Re-crimp V wire; test camera separately | | No chime on call | Call wire not connected | Verify C terminal on both ends | | Buzzing/humming | Ground loop | Ensure - terminal is common to all devices | | Monitor beeps constantly | Call button stuck | Disconnect CALL wire; if stops, replace button | Double-check that terminal 1 on the door phone
Whether you are replacing an old, yellowing monitor or installing a fresh system, the installation process can seem daunting. Is it plug-and-play? Do I need an electrician? What do all those colorful wires do? If you are installing multiple monitors in the