network activity.)
2. The BATT FAULT, PEER COM, and FAULT LEDs shut Off. The RUN LED flashes to indicate that the
NCE software is loading.
3. The LEDs display the operational status of the network engine. When the RUN LED goes On
Steady, startup is complete and the network engine is operational.
The total time to start up the network engine depends on the size of the database and can take
several minutes.
Table 15: LED designations, normal status, and descriptions
LED designation Normal status Descriptions/other conditions
POWER (Green) On steady On Steady = Unit is getting power from either the
battery or 24 VAC power.
Off Steady = Unit is shut down.
FAULT (Red) Off steady Off Steady = Normal operation.
On Steady = General Fault. CCT application may
be corrupted or missing. Some FAULT conditions
are user-configurable in the Metasys software. Pre-
configured fault conditions include excessive CPU
flash or memory use, excessive board temperature.
Blink - 2 Hz = Download or Startup in progress, not
ready for normal operation.
Blink Rapidly - 5 Hz = One or more defined SA
Bus devices are offline. Check SA Bus devices for
problems, including low batteries on wireless
sensor.
SA BUS (Green) Blinking Blinking - 5 Hz = Data Transmission (normal
communication)
Off Steady = No Data Transmission
On Steady = Communication lost, waiting to join
communication ring
FC BUS (Green) Flicker Flicker = Normal communications; the FC Bus
is transmitting and receiving data. Flickers are
generally synchronized with data transmission but
do not use them to indicate specific transmission
times. Off Steady = No field controllers are defined
to FC Bus in the network engine. This LED is always
OFF on LON models with 9.0.7 software.
MODEM RX Flicker Not functional on 9.0.7 engines.
MODEM TX Flicker Not functional on 9.0.7 engines.
BATT FAULT (Red) Off steady On Steady = Battery defective. Flicker = Data
Protection Battery is not installed. Connect or install
battery.
31NCE25 Installation Instructions
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