3-2
When a fault or isolate condition is detected by the 4100U-S1, the operator interface does the
following:
• The yellow “FAULT” or “ISOLATE” indicators flash
• The sounder (buzzer) sounds steady
• The alphanumeric display on the interface panel indicates the fault or isolate condition, as
shown below.
Figure 3-1. Operator Interface Showing Fault Condition
The first step in managing a fault or isolate condition is to acknowledge the condition.
Acknowledging a fault or isolate condition does two important things:
• It records the time and date at which you observed the presence of the condition and
stores that information in the system’s historical log.
• When you press the <FAULT ACK> or <ISOLATE ACK> key, the system displays
specific data on the location of the condition. (In the case of Isolate it gives confirmation
on the LCD that you have isolated the correct zone).
It is important to understand that the 4100U-S1 can be configured with either Global or
Individual Acknowledge. These options function as follows:
• Global Acknowledge. When global acknowledge is enabled, one press of the
<FAULT ACK> key acknowledges every point that is currently reporting a fault
condition. Similarly for <ISOLATE ACK>.
• Individual Acknowledge. If individual acknowledge is enabled, the <FAULT ACK>
key must be pressed repeatedly to individually acknowledge each fault condition.
Similarly for <ISOLATE ACK>.
.
Continued on next page
Acknowledging Fault or Isolate Conditions
How the 4100U-S1
Indicates the
Presence of a Fault
What Acknowledge
Does
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