How to interpret System Troubles with the D621 Keypad.


  • 1.  Ensure the area is disarmed.

  • 2.  Press Cmd + 4 + 2.  The flashing Cmd light is a prompt to enter a valid passcode. 

  • 3.  Enter a valid passcode and the D621 displays system trouble events by lighting the point indicators (zone leds)as described below:

  •  Zone 1 Lit steady = Telephone line Fail

  •  Zone 1 Slow Flash = Comm Fail, Destination 1

  •  Zone 1 Fast Flash = Comm Fail, Destination 2

  •  Zone 2 Lit steady = Alternate Comm Trouble

  •  Zone 3 Lit steady = Installer Switch Closed

  •  Zone 4 Lit steady = Backup Battery low

  •  Zone 4 Lit steady = Slow Flash = Backup Battery Missing

  •  Zone 5 Lit steady = Bell Supervision Fail

  •  Zone 6 Lit steady = RF Receiver Jamming

  •  Zone 6 Slow Flash = RF Receiver Trouble

  •  Zone 7 Lit steady = Data Bus Device Missing

  •  Zone 7 Slow Flash = Data Bus Device Tamper

  •  Zone 7 Fast Flash = Data Buss Device Trouble/Reset

  •  Zone 8 Lit steady = System Fault

  •  Zone 8 Slow Flash = Service Interval

  •  Zone 8 Fast Flash = Ground Fault Condition

Press Cmd to return to the off state.