Doc. No. 503-0800ZE-M-01 ZP3-ECU Maintenance Manual
Page 14 Issue 1 (01/08/2006)
Extinguishant Discharge Siren Fault
Indications
• Extinguishing Bell Fault LED on the Extinguishing Control Unit illuminates.
• Fault LED on the Extinguishing Control Unit illuminates.
• Fault message is displayed on the ZP3/ZP5 Control Panel and the panel buzzer sounds. The
Fault LED on the Control Panel also illuminates.
GNFLT Zone 001 Dev 5001 Event 002
Probable Cause
• EOL resistor across the Extinguishant Discharge Siren is not inserted.
• Monitored wiring is open or short-circuited.
• Faulty Fire Bell fuse.
Corrective Actions
1. Press the ACCEPT button to accept the fault.
2. Inspect the EOL resistor. If it is missing, insert one between terminals 7 & 8 of TB1 on the ECU
main board.
3. Check the continuity of the monitored wiring.
4. Inspect Fire Bell fuse, replace if necessary.
5. Reset the panel.
Extinguishant Pressure Verification Switch Fault
Indications
• Fault LED on the Extinguishing Control Unit illuminates.
• Fault message is displayed on the ZP3/ZP5 Control Panel and the panel buzzer sounds. The
Fault LED on the Control Panel also illuminates.
GNFLT Zone 001 Dev 5001 Event 002
Probable Cause
a. SWT3-1 on the main PCB of the Extinguishing Control Unit is set to ON and the Extinguishant
Pressure Verification Switch is NOT connected.
b. SWT3-1 on the main PCB of the Extinguishing Control Unit is set to OFF and the Extinguishant
Pressure Verification Switch IS connected.
Corrective Actions
1. Press the ACCEPT button to accept the fault.
2. Switch OFF SWT3-1 on the main PCB of the Extinguishing Control Unit (cause a) or
alternatively switch ON SWT3-1 on the main PCB of the Extinguishing Control Unit (cause b).
3. Reset the panel.
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