D-7
There are several types of results that can display at the end of an Earth Fault Search. This
section covers all types of results.
IMPORTANT: Once you have been directed to an earth ground fault and
corrected it, it is recommended that you restart the system (warm- or cold-
start).
A non-point fault indicates a ground that cannot be traced to an addressable point (for
example, a shield ).
Non-point faults can be displayed for each of the following items:
Channel Output (IDNet Card; MAPNET Interface Card).
RUI Channel (Master Controller Card).
A point fault indicates a ground at a specific addressable point.
Point faults can be found at any point in the system that connects to field wiring.
Some IDNet channel point fault examples are illustrated below.
Fault not cleared. The message below shows that an IDNet channel that has been
isolated for fault detection still has the earth fault:
CARD 2, IDNET CARD (250 POINTS)
M1, EARTH FAULT SEARCH FAULT CLEAR FAIL
Fault between channel output and first isolator. The message below shows a fault
between the IDNet channel output and the first isolator on the line:
CARD 2, IDNET CARD (250 POINTS)
M1, CHANNEL OUTPUT EARTH FAULT
4009 IDNet NAC Extender/TrueAlert Addressable Controller faults. The message
below shows a fault detected on the 4009 IDNet NAC Extender before the repeater
connected to that circuit is turned on:
CARD 2, IDNET CARD (250 POINTS)
M1-18, 4009A NAC EARTH FAULT
Conversely, the following example shows a fault detected after the repeater connected to
that circuit is turned on:
CARD 2, IDNET CARD (250 POINTS)
M1-18, 4009A REPEATER EARTH FAULT
IDNet isolator fault. The message below shows a fault detected after the IDNet isolator
was turned on:
CARD 2, IDNET CARD (250 POINTS)
M1-3, IDNET ISOLATOR EARTH FAULT
Continued on next page
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Overview
Non-Point Faults
Point Faults
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