Transmit Error; Normal Operation; Transmitting An Alarm; Table 8. Bar Graph Led Indications - ADEMCO 7845CZ Installation And Setup Manual

Transmit Error:

The bar graph LEDs also indicate failed message transmission error codes by the number of
lit segments. Refer to the "Transmitting an Alarm" paragraph in this section for details.
YEL YEL GRN
INCREASING SIGNAL STRENGTH
Signal Strength Bar Graph
Lit
Rapid chaser
From left to right, one or more
LEDs are lit, with the leading
LED either lit or blinking.
Yellow LED not lit, green LEDs
sequentially being lit from right to
left – counting down.
Yellow LED is blinking, green
LEDs sequentially being lit from
right to left – counting down.
Flash in unison

Normal Operation

With the 7845CZ installed, programmed, and registered, and after a successful transmission
of the Power on Reset message, the 7845CZ enters normal operation. Normally, with good
cellular coverage and no messages pending, the yellow status LED will flash in one of two
patterns indicating the operating carrier.
•
Yellow flashing once per second indicates no alarm messages are pending and that the
7845CZ is connected to a cell being operated by the "B" side carrier.
•
Yellow flashing twice rapidly, then a pause every second, indicates no alarm messages
are pending and the cell that the 7845CZ is in contact with is operated by the "A" side
carrier.
Refer to Table 7 for all LED patterns.
At any point during operation, the red LED lights when contact with the cell has been lost. The
7845CZ automatically attempts to regain contact with the cell. If contact is not regained before the
programmed radio fault time, the radio fault changes state, sending a radio fault to the control
panel.

Transmitting an Alarm

While in normal operation, triggering the zone or reception of a valid ECP message initiates
the transmission of an alarm. The yellow status LED lights, indicating a pending message.
The green LED flashes rapidly when the alarm message has been successfully transmitted.
The yellow LED begins to flash rapidly, indicating the 7845CZ is waiting for a message
validation from AlarmNet Control. This may take several minutes to receive, since the
GRN GRN
YELLOW

Table 8. Bar Graph LED Indications

PATTERN
GRN
YEL YEL GRN GRN
OFF
Initial Power-Up Display
Power on, or
LED Test
Power on reset condition.
Normal RSSI display. See Figure 2 and refer to the "Selecting
a Radio Installation Site" paragraph in Section 4 for a
description of this display.
Radio initial power-up sequence. This display is seen only
when the 7845CZ is being powered up. Refer to the "Initial
Power-Up Sequence" paragraph in Section 4 .
Radio registration sequence. This display is seen only when
the 7845CZ is being registered. Refer to Section 6:
Registration.
Registration unsuccessful.
Section 7: Operation Overview
YEL GRN
YEL
YELLOW
BLINKING
Radio Registration Display
MEANING
GRN GRN
7–3