HST HP101 - 5. Fault Finding; Fault LED and sense zone fault LED flashing, buzzer sounding; Fault LED and Sounder(NAC) zone fault LED flashing, buzzer sounding; Fault LED flashing and Mains fault LED on, buzzer sounding

The alarm panel's sounder will activate if a trouble condition exists. In a trouble
condition, the panel displays the zone or devices causing the trouble condition. The
trouble indicator goes out automatically when the situation causing the trouble
condition is rectified or restores to normal.
5.Fault Finding
Front panel buttons not working.
To activate the front panel buttons, turn the key switch in the top left of the panel
to the ON position.
LED blinks intermittently
This is perfectly normal and indicates that the processor is running an internal
memory check.
Fault LED and sense zone fault LED flashing, buzzer sounding.
Faults monitored are:
• Open circuit on the sense zone wiring.
• Short circuit on the sense zone wiring.
• Detector head removal.
Check all detectors and call points on the sense zone indicated. Check wiring is as
in example diagrams and ensure the end of line monitor is a 4K7 resistor or an
active end of line device.
Fault LED and Sounder(NAC) zone fault LED flashing, buzzer sounding.
Faults monitored are:
• Open circuit on the Sounder (NAC) zone wiring.
• Short circuit on the Sounder (NAC) zone wiring.
Check Sounder (NAC) zone wiring is as in example diagrams and ensure that
the
10K end of line resistor is fitted.
Fault LED flashing and Mains fault LED on, buzzer sounding.
Faults monitored are:
• Mains supply not present.
• Blown mains fuse.
Check relevant fuses and fuse clips.
Fault LED flashing and Battery fault LED on, buzzer sounding.
Faults monitored are:
• Battery supply not present.
• Batteries damaged or not fully charged.
• Blown battery fuse.
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