Is there away to make the Primary Fail LED of the D928 stay off for a Local System?
Yes, the D928 Primary LED is on because the phone line Voltage is below 6 VDC. To turn the LED off in programming set the Phone Line Supervision to (0).
The D928 module has a circuit that monitors the operation of the control panel’s CPU (Central Processing Unit). If the CPU fails, a buzzer on the D928 sounds as does a sounder in the control panel. You cannot reset this watchdog sounder when the CPU fails. The D928 stops sounding only when the control panel’s CPU returns to normal operation.
The D928 is required for a UL Fire installation and to comply with NFPA on Non- GV2 panels.