How to Diagnose the D928 Buzzer
The buzzer is sounding on the D928 continuously.
This means that there is a CPU fail on the panel. The sounder on the panel should be beeping as well. The buzzer on the D928 will stop sounding once the panel's CPU has returned to normal.
Part numbers D7212B, D9112B, D7212B1, D9112B1, D7212, D7412, D9112, D9124, D9412, D7412G, D9124G, D9412G, D7412GV2, D9124GV2, D9412GV2, D7412GV3, D9412GV3, D928