NFPA 72 Remote Station Fire Alarm System
Appendix C: NFPA Standard-Specific Requirements
The PDRP-1001 PN 50734:C 03/11/99 41
Troubleshooting Table
Table 8 Trouble Shooting Table
SYMPTOM PROBLEM SOLUTION
AC Power LED on
System trouble LED on
Circuit trouble LED on Notification appliance circuit trouble
1. Check TB2 for proper connections. (TB3 for
4XB panels)
2. Remove all field wiring and install dummy ELR
at output circuit. Check for supervisory voltage
across it. (Normal -2.3 V). If problem persists,
replace circuit board.
3. Removed dummy ELR, reconnect field wiring
and measure voltage across output; (trouble -5V,
short OV).
4. Check for ELR at last device.
5. Check field wiring.
Any of the right column
yellow LEDs flashing
Initiating zone open circuit trouble
1. Check TB4 for proper connections.
2. Remove field wiring for zone in trouble and
install dummy ELR (4.7K for 24V; 2.2K for 12V).
If problem persists, replace circuit board.
3. Check for ELR at last device.
4. Check field wiring.
Any of the right column
yellow LEDs steady on
Zone Disable Check installation manual.
Power trouble LED on
Battery trouble
Batt yellow LED
on
Missing or
Disconnected
Check battery connections
Low or damage
battery
1. Remove batteries, check voltage across charger
output (17 to 19V for 24V; 8-10V for 12V),
otherwise replace circuit board.
2. Reconnect batteries, measure battery voltage at
battery terminals. If voltage is less than 85% of
rated voltage, allow them to charge for 48 hours.
3. If problem persists, replace batteries.
Ground fault trouble
Earth yellow LED on
1. Remove field wiring from main panel and
optional module(s) (if installed). Install dummy
ELR (4.7K for 24V; 2.2K for 12V).
2. Remove both battery leads.
3. If trouble clears, connect one circuit at a time to
pinpoint the problem.
4. If trouble doesn’t clear, replace circuit board.
Yellow LED on 4XTM on 4XTM 1. Move Municipal Box disconnect switch SW1 up
OPT1, OPT2 jumper cut
Install optional module(s) or replace jumper if
module(s) is not used.
Municipal Box open circuit
1. Install dummy load if Municipal Box option
isn’t used.
2. Check Municipal Box wiring.
Any of the right column red LEDs on Short on initiating circuit wiring
Remove field wiring and install ELR. If trouble
clears, look for faulty or incorrectly wired devices.
Disconnecting Municipal Box switch on 4XTM
does not create a trouble
Jumper for optional modules isn’t
cut.
Cut associated jumper OPT1 or OPT2.
4XZM: associated LED does not activate for alarm,
trouble or supervisory conditions
Optional module trouble
1. Make sure module is properly installed.
2. Move disable switch SW1 on 4XZM to the left.
RZA-4X piezo doesn’t sound for alarm, trouble or
supervisory conditions
4XLM
1. Make sure that 4XLM module is installed on J7
and J8.
2. Check field wiring.
Micro Fail yellow LED on Microprocessor damaged. Replace circuit board.
All RZA-4X LEDs stay on
Power wasn’t removed prior to
installation.
Hit system reset.
AC Power LED off
System trouble LED on
Loss of main power
Check incoming power (TB5). (TB1 for 4XB
panels)
Damaged circuit breaker Replace circuit board.
Micro Fail yellow LED on Microprocessor damaged Replace circuit board.
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