Maintenance - AT&T Door Phone Controller Installation And Operation Manual

Table 7-1. Troubleshooting Procedures (Continued)
Trouble
Cannot open door remotely
using either Remote Door
Open Button or the Door
Code
Selected options are not
operating as expected

Maintenance

7-4 Troubleshooting and Maintenance
Possible Cause
Improper wiring to existing door
strike device. May be caused
by improper connection and use
of NO (Normally-Open), NC
(Normally Closed), and C
(Common) door latch relay
contacts, especially when
interfacing these contacts to
existing door configurations.
Incorrect or inappropriate values
were entered.
Periodic maintenance is not required.
Units requiring repair are returned to AT&T for service.
Possible Solution
Verify all connections when
connecting the door strike
contacts on the AT&T Door
Phone Controller to existing
door open buttons. Make sure
of the following:
1. The NO and C contacts
are connected in parallel to a
normally-open button.
2. The NC and C contacts
are connected in series to a
normally-open button.
Use Verify mode to confirm
selected options without
changing the values.
Carefully consider the
"consequences" of options
chosen.