Running Aefd - Simplex 4100ES Operator's Manual

Advanced Earth Fault Diagnostic (AEFD),

Running AEFD

When you run the Advanced Diagnostics, the following pseudo points turn on:

Digital pseudo point P438, GROUND FAULT SEARCH ACTIVE turns on. This
pseudo point indicates that the Advanced Diagnostic is active, and that fire alarm
operation is temporarily compromised.

Digital pseudo point P57, Keypad Inactivity Timer Disable turns on. This pseudo point
disables the timer that refreshes the LCD display on the front panel, after 30 seconds of
inactivity.
When you run the AEFD, the power supply takes an earth to ground measurement with all earth
searchable circuits turned on. For example, on the 4010 ESS, these circuits include all IDNAC and
AuxNAC circuits on the ESS, and the RUI circuit on the CPU card, or on the 4100ES, all
searchable circuits in the same unit. The CPU isolates all earth searchable circuits and takes
another earth to ground measurement. Next, the CPU activates and measures the earth to ground
condition of each individual field circuit, one by one. The report concludes, and the results display
on the screen.
Note: All electrically isolated circuits that cannot generate a general earth fault trouble are excluded from
the search, for example, RUI+ mother board, IDNET1+, IDNET2, and so on.
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Figure 2. Report tab
67