NFS2-640/E Operations Manual —
P/N 52743:F1 06/16/2011
31
Output Circuit Trouble Mode of Operation
Operation of the Control Panel
3.12.2 How the Control Panel Indicates a NAC Trouble
A Trouble occurring on a NAC causes the control panel to do the following:
•
Produce a pulsed audible tone
•
Flash the
SYSTEM
TROUBLE
LED
•
Turn on the Trouble relay (TB4)
•
Send a message to the LCD display, History buffer and installed printers, FDU-80
annunciators, and CRT-2s
•
Display a
TROUBL
status banner and a
CONTROL
Type Code on the LCD display, along with
information specific to the device
Figure 3.1 Sample of a NAC in Trouble Message
3.12.3 How the Control Panel Indicates a Control/Relay Trouble
A trouble occurring on a control/relay module or control/relay transponder causes the control panel
to do the following:
•
Produce a pulsed audible tone
•
Flash the
SYSTEM
TROUBLE
LED
•
Turn on the Trouble relay (TB4)
•
Send a message to the LCD display, History buffer and installed printers FDU-80
annunciators, and CRT-2s
•
Display a
TROUBL
status banner and
CONTROL
Type Code on the LCD display, along with
information specific to the device
Figure 3.2 Sample of a Control/Relay Module in Trouble Message
3.12.4 How to Respond to a NAC or Control/Relay Trouble
If the control panel indicates an active NAC or Control/Relay Trouble, take the following action:
1.
Press the
ACKNOWLEDGE
/
SCROLL
DISPLAY
key to silence the panel sounder and switch the
SYSTEM
TROUBLE
LED from flashing to steady—regardless of the number of troubles, alarms,
and supervisory signals.
2.
The control panel sends an Acknowledge message to the History buffer and installed printers,
FDU-80 annunciators, and CRT-2s. Check the trouble message for the location and type of
trouble.
3.
Correct the condition causing the trouble.
4.
When the trouble condition is corrected, the panel will return to normal operation (indicated by
the “System Normal” message).
5.
The control panel sends a “System Normal” message to the LCD display, History buffer and
installed printers, FDU-80 annunciators, and CRT-2s.
Status banner
Type Code
Time and date of trouble
T R O U B L C O N T R O L F R O N T H A L L W A Y N O . 2
O P E N 0 9 : 3 8 A 0 4 1 5 0 8 B 0 2
Device Address
Type of Trouble
Custom Description for
this device location
T R O U B L C O N T R O L M O D U L E A D D R 1 M 0 4 4
O P E N 0 9 : 3 8 A 0 4 1 5 0 8 1 M 0 4 4
Status banner
Type Code
Time and date of trouble
Device Address
Type of Trouble
Custom Description for
this device location
