36 NFS2-640 Operations P/N 52743:L4 06/10/19
Operation of the Control Panel Output Circuit Trouble Mode of Operation
• The LCD display status banner displays ACTIVE as shown:
Figure 4 Sample Trouble Monitor Point Message
• The monitor module is non-latching: the module will return to normal when the trouble
condition no longer exists.
• The monitor modules activate Control-by-Event
• The panel trouble relay transfers (TB4)
3.12.2 How to Respond to an Active Trouble Monitor
If the control panel indicates an active Trouble Monitor Point, 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.
3.13 Output Circuit Trouble Mode of Operation
3.13.1 Overview
Output circuits include NACs, Control/Relay Modules, and Transponder Points. This section con-
tains a description of control panel operation for each type of output circuit.
• Four NACs are included on the control panel
• Control/Relay Modules connected to the control panel on an SLC
• Transponder Points: XPC-8 (CLIP only), or XP6-C (CLIP or FlashScan)
Status banner
Type Code
TROUBL TROUBLE_MON INTENSIVE CARE UNIT
EASTERN WING 09:38A 041515 1M044
Custom descriptor for
this device location
Device address
Time and date of trouble
Extended 12 character
custom label
Trouble Type Codes for Control Modules and NAC Circuits
Type Code
Silenceable
(Y/N)
Configuration Device Function
CONTROL N NAC Supervised NAC
RELAY N FORM-C relay Relay Output
BELL CIRCUIT N NAC Supervised NAC for notification appliance
STROBE CKT N NAC Supervised NAC for notification appliance
HORN CIRCUIT N NAC Supervised NAC for notification appliance
AUDIBLE CKT N NAC Supervised NAC for notification appliance
SPEAKER N NAC Supervised NAC for speaker circuit
REL END BELL N NAC Supervised NAC for notification appliance
blank N NAC Supervised NAC for undefined device
Table 3.8 Control Module and NAC Circuit Trouble Type Codes (1 of 2)
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