ZP3-ECU Maintenance Manual Doc. No. 503-0800ZE-M-01
Issue 1 (01/08/2006) Page 13
Extinguishant Pressure Faults
Indications
• Extinguishant Pressure Low 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 Pressure Low switch is not inserted.
• Extinguishant pressure is low.
Corrective Action
1. Press the ACCEPT button to accept the fault.
2. Inspect the EOL resistor. If missing, insert one between terminals 17 & 18 of TB1 and the ECU
main board.
3. Reset the panel.
4. If the condition still exists, check the pressure in the extinguishant cylinder.
Fire Bell Fault
Indications
• Fire 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 Fire Bell is not inserted or the monitored circuit wiring is open or short-
circuited.
Faulty Fire Bell Fuse, replace if necessary.
Corrective Action
1. Press the ACCEPT button to accept the fault.
2. Inspect the EOL resistor. If missing, insert one between terminals 4 & 5 of TB1 on the ECU
main board.
3. Check continuity of the monitored circuit wiring.
4. Reset the panel.
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