Installation Guide
FPP-RNAC-8A-4C | Operation and Installation Guide | 5.0  FPP-RNAC-8A-4C Local Status Display
22  Bosch Security Systems, Inc. | 8/09 | F01U025431-02
Table 10: Local Status Display LED Functions (continued) 
LED Label Color Description 
3  SYSTEM  Yellow  Blink Count  Description 
TROUBLE  (The Trouble Relay activates or changes state.) 
(display priority) 
      1  Any memory fault (RAM, FLASH, watchdog, 
unexpected interruptions, stack corruption). 
      2  Power supply overvoltage. 
      3  Low battery or missing battery 
      4  Battery charger circuit trouble. 
      5  Auxiliary power overcurrent condition – the current is 
measured at the Auxiliary Power Port output. 
      6  System overcurrent – The combined currents 
measured at each NAC output together with the 
Auxiliary Power Port output. 
      7  Power supply output voltage is low. 
      STEADY  The SYS TRBL LED and the Trouble Relay are 
active when the Flash Programming module is 
connected. 
4 GROUND 
FAULT 
Yellow  Ground Fault - Indicates that the NAC output wiring is not connected properly to 
an external source or ground. 
The Trouble Relay is deactivated. 
5  TRBL1  Yellow  Output 1 has an open or shorted EOL 
The Trouble Relay is deactivated. 
6  TRBL2  Yellow  Output 2 has an open or shorted EOL 
The Trouble Relay is deactivated. 
7  TRBL3  Yellow  Output 3 has an open or shorted EOL 
The Trouble Relay is deactivated. 
8  TRBL4  Yellow  Output 4 has an open or shorted EOL 
The Trouble Relay is deactivated. 
Figure 13:  FPP-RNAC-8A-4C LEDs 
INPUT ACTIVE
AC OK
SYSTEM TROUBLE
GROUND FAULT
TROUBLE 4
TROUBLE 3
TROUBLE 2
TROUBLE 1










