Trouble Shooting Guide; General Fault Indicator - Numens 4001 Series Installation And Service Manual

10. TROUBLE SHOOTING GUIDE

10.1. General Fault Indicator

The FAULT indicator in the STATUS area of the display
is always illuminated whenever the control and indicating
equipment is in the Fault Condition. The General fault
indicator is associated with a specific fault that will be
indicated in the ZONES or FAULTS area of the display.
Condition Description
Zone Fault Indicates a fault in the alarm zone transmission
path between the control and indicating
equipment and connected devices (eg detectors,
manual call points, modules, etc).
The causes include short- and open-circuit of
the wiring.
Mains Supply Indicates the unavailability of the mains power.
Fault
Battery Fault Indicates the unavailability of the battery power,
or a voltage level less than DC 20 V. The battery
may be depleted because the mains supply has
been unavailable for an extended period of time,
or there is a fault in the battery charger that
prevents the batteries from being charged.
System Fault Indicates a fault with the internal supply voltages
used to supply power to the microprocessor, or
to the running of the control program.
Indicates a current leakage from any of the fire
Earth Fault
detection and alarm system wires to Earth. This
may occur if there is damage to a single
conductor, and it contacts some conductive
equipment connected to Earth.
All specifications and other information shown were current at the date of publication and subject to change without notice.
4001 non-addressable control and indicating equipment
20
© 2015 ~ 2018 Ambest Electronics (Ningbo) Co Ltd. All rights reserved.
Installation and Service Manual
Actions
Check the wiring for damage or
disconnection.
Check the power supply fuse.
Replace the fuse if it is faulty.
Check the incoming mains supply
voltage.
Check that the battery connections
are secure.
Measure the battery voltage. If the
battery voltage is less than the
manufacturer's minimum voltage,
replace the batteries.
Measure the battery charging voltage
to ensure the battery charger is
operating correctly.
Measure the battery internal
resistance to ensure it is less than
0.5 Ω.
Contact the service company to
replace the main controller.
Isolate each of the transmission
paths in turn until the conductor
causing the Earth has been
identified.
Trace the faulty conductor to locate
the source of the connection to
Earth.
32-0002-r12_2018-09