Appendix D: Point and System Troubles Lists
System Troubles
80
NFS-640 Operations Manual P/N 51334:B 10/03/2003
System Troubles
A message from the “Trouble Type” column in the following table will appear in the panel display when
a system trouble occurs. Use this table to help determine the cause of the trouble.
Table D.2 System Troubles
SYSTEM TROUBLES
TROUBLE MESSAGE TYPE
TROUBLE DESCRIPTION
AC FAIL
The main power supply has lost AC power.
ADV WALK TEST
There is an Advanced Walk Test in progress.
ANNUN x NO ANSWER
The annunciator at address x is not responding.
ANNUN x TROUBLE
The annunciator at address x is in trouble.
AUXILIARY TROUBLE
Auxiliary device connected to the CPU-640 at J5 is in trouble or cable is missing.
WALK TEST
A Basic Walk Test is in progress.
CHARGER FAIL
The main power supply’s battery charger is not working properly. Correct the fault.
BATTERY
The main power supply’s battery charge is too high or too low. Check batteries, replace if
necessary.
BAT.BACKUP RAM
RAM battery backup is low. Replace battery.
CORRUPT LOGIC EQUAT
The database that houses the panel’s logic equations is corrupt. It must be re-downloaded, or all
programming must be cleared and re-entered.
DRILL INITIATED
Drill has been initiated.
EPROM ERROR
The application and/or boot code is corrupt. Service required.
EXTERNAL RAM ERROR
The external RAM test failed. Service required.
GROUND FAULT
A ground fault has occurred within the panel.
GROUND FAULT LOOP x
There is a ground fault on loop x.
INTERNAL RAM ERROR
The internal RAM test failed. Service required.
LOADING.NO SERVICE
A program or database download is in progress. The panel is NOT providing fire protection
during the download. Proper authorities should be notified while a download is in progress so
that other means of fire protection can be supplied.
MASTER BOX TROUBLE
A TM-4 connected to a municipal box is in trouble.
MASTER BOX NO ANSWER
A TM-4 connected to a municipal box is not responding.
NCM COMM FAILURE
Communication is lost between the CPU-640 and the NCM.
NETWORK FAIL PORT x
Communication lost between NCM Port x and corresponding node.
NETWORK INCOMPATIBLE
The brand of this panel is incompatible with this network.
NFPA 24HR REMINDER
This message occurs every day at 11 am if any troubles exist.
NO DEV. INST ON L1
No devices are installed on the system.
PANEL DOOR OPEN
The panel door is open.
PROGRAM CORRUPTED
The database that houses the panel’s programming is corrupt. It must be re-downloaded, or all
programming must be cleared and re-entered. Service required.
STYLE 6 POS. LOOP x
There is a short circuit on the positive side of loop x. Style 6 and Style 7 are supervised methods
of communicating with addressable devices. If the control panel detects a trouble (open or
short), it will drive both ends of the loop, maintaining communication in an unsupervised method.
The latching trouble will display on the panel as a Style 6 trouble until you correct the condition
and press reset. Style 7 configuration of the SLC requires the use of ISO-X modules.
STYLE 6 NEG. LOOP x
There is a short circuit on the negative side of loop x. Style 6 and Style 7 are supervised methods
of communicating with addressable devices. If the control panel detects a trouble (open or
short), it will drive both ends of the loop, maintaining communication in an unsupervised method.
The latching trouble will display on the panel as a Style 6 trouble until you correct the condition
and press reset. Style 7 configuration of the SLC requires the use of ISO-X modules.
STYLE 6 SHORT LOOP x
Style 6 and Style 7 are supervised methods of communicating with addressable devices. If the
control panel detects a trouble (open or short), it will drive both ends of the loop, maintaining
communication in an unsupervised method. The latching trouble will display on the panel as a
Style 6 trouble until you correct the condition and press reset. Style 7 configuration of the SLC
requires the use of ISO-X modules.
UDACT NO ANSWER
The UDACT is not responding.
UDACT TROUBLE
The UDACT is in trouble.
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