6.4.3. Mk-791 / Mk-891 does not call out or make paging calls.

Go to ‘Troubleshooting’

Go to ‘Telealarm Index’

The Audio Module is Not Receiving Proper Power Supply.

• Check the input terminals of the module with a multimeter to ensure that the voltage is correct and stable.
• The correct voltage range for the audio module is from 8V DC to 18V DC.

Audio Module Not Restarted Correctly.

• If a brief power interruption has occurred, it may cause the module to not restart properly. Disconnect the module’s power supply and reconnect it.

CAN Wiring.

• Ensure there are no cuts or deformations in the two CAN communication wires with the GSR.
• Check that the wires are connected to the correct pins (H with H and L with L).
• Verify that the terminals and connectors have good contact, with no sunk screws, broken strips, or loose wires.
• Use a multimeter to check continuity in the CAN communication wires.
• If there are multiple sections in the CAN communication installation, they should be tested independently.

!If, after performing the aforementioned actions, the audio module still fails to make calls or announcements, please contact Support for replacement of the audio module.