Owner's manual

Installation 151053-L8
3-5
3.4.2 LED Descriptions
This section describes what each LED indicates. The 5104 has a total of seven LEDs, three are visible externally
and four are visible only if the cabinet door is open. See Section 8 for additional information on LED operation.
3.4.2.1 Externally Visible LEDs (L3, L4, & L5)
This section describes the three LEDs (one green and two yellow) that are visible externally through the window
on the 5104 cabinet door. Refer to Table 3-2 and Figure 3-2.
3.4.2.2 Phone Line Fault Indicator LEDs (L6 &L7)
The 5104 has a built-in dual-phone line monitoring circuit. This circuit detects any fault in the phone line by
monitoring the loop current and DC voltage. If the phone line drops to 1.8 VDC @ 5 mA or below for 40 to 90
seconds the on-board piezo and the corresponding LED will turn ON. The control panel will then report the fault
condition to the central station on the other phone line. For example, if phone line one looses phone line voltage,
the on-board piezo and the L6 will turn on, then the control panel will report the faulted line on phone line two.
See Figure 3-2 for LED Locations
Note: To comply with NFPA 72 the model 5104 is equipped with phone line seizure. This means that any time the
control panel dialer needs to communicate with the central station, it will not be possible to use the tele-
phones that are on the same line as the fire system. During communication to the central station the phone
lines will be seized for approximately one minute. However, under adverse telephone circuit conditions
phone line seizure could last as long as 15 minutes.
Table 3-2: Externally Visible LEDs
LED # Name Color Description
L3 Power Green
Normally ON unless the panel loses AC power or the panel is
being reset.
L4 Silenced Yellow
Normally OFF unless a trouble or supervisory condition has
been silenced.
L5 Dialer Yellow
Normally OFF unless there is a phone line or communication
problem. See Section 3.4.2.2 for additional information.
Table 3-3: Phone Line Fault Indicator LEDs
LED # Name Color Description
L6 Phone Line 1 Fault Red
Visible only when the 5104 cabinet is open. If ON indicates
that phone line 1 is faulted. A faulted condition is indicated if
the phone line voltage drops below 1.8 VDC and the loop
current is less than 5 mA. Flashing indicates a communication
error has occurred.
L7 Phone Line 2 Fault Red
Visible only when the 5104 cabinet is open. If ON indicates
that phone line 2 is faulted. A faulted condition is indicated if
the phone line voltage drops below 1.8 VDC and the loop
current is less than 5 mA. Flashing indicates a communication
error has occurred.