Table 5: NAE-S LEDs Designation, Normal Status, Description, and Other Conditions
LED
Normal
Descriptions/Other Conditions
FC A (Green)
Flicker
On Steady = Controllers are defined to FC A (FC Bus 1 or N2 Trunk 1) in the
network engine, but none are communicating (network engine transmitting
only). Flicker = Normal communications; FC A port is transmitting and
receiving data. Flickers are generally in sync with data transmission but
should not be used to indicate specific transmission times.
Off Steady = No field controllers are defined to FC A (FC Bus 1 or N2 Trunk 1)
in the network engine.
FC B (Green)
Flicker
On Steady = Controllers are defined to FC B (FC Bus 2 or N2 Trunk 2) in the
network engine, but none are communicating. (network engine transmitting
only) Flicker = Normal communications; FC B port is transmitting and
receiving data. Flickers are generally in sync with data transmission but
should not be used to indicate specific transmission times.
Off Steady = No field controllers are defined to FC B (FC Bus 2 or N2 Trunk 2)
in the NAE-S.
PEER COMM (Green)
Varies (see next
column)
Flicker = Data traffic between network engines. For a network engine that
is not a Site Director, this LED indicates regular heartbeat communications
with the Site Director. For a Site Director network engine, flashes are more
frequent and indicate heartbeat communications from all other network
engine devices on the site. For a single network engine on a network without
an ADS, there is no flicker.
Run (Green)
On Steady
On Steady = NAE-S software is running.
On 1 second, Off 1 second = NAE-S software is in startup mode.
On 0.5 seconds, Off 0.5 seconds = NAE-S software is shutting down.
Off Steady = Operating system is shutting down or software is not running.
24 VAC (Green)
On Steady
On Steady = 24 VAC power is present.
Off Steady = Loss of 24 VAC power. In the Off Steady condition, the network
engine can be running on battery power. Also see the POWER LED.
BATT FAULT (Red)
Off Steady
On Steady = Battery fault. Replace the battery. Battery is not connected
or cannot be charged. The BATT FAULT LED may remain On for up to 24
hours after initially powering on the network engine. If the BATT FAULT LED
remains on longer than 48 hours after initially powering on the network
engine, check the battery connection or replace the battery.
GENL FAULT (Red)
Off Steady
On Steady = General Fault. Fault conditions are user configurable in
software. Preconfigured fault conditions include excessive memory use,
excessive flash use, excessive CPU or PWB temperature, and Battery Fault.
In normal operation, the GENL FAULT LED stays on steady for the first half of
the startup sequence.
Repair Information
If you replace an NAE-S network engine for any reason or
add a new network engine to a site, you must update the
site registration to ensure that the new network engine
is recognized and able to communicate. Refer to the
Replacing an NAE55
section in the
NAE55 Commissioning
Guide (LIT-1201519)
for information on replacing a network
engine and configuring the new network engine to
communicate in a
Metasys
system site.
Except for replacing the data protection battery or
the Delta power supply, the network engine cannot
be repaired in the field. If the network engine fails to
operate, it must be replaced. Please contact the Johnson
Controls
®
Repair Center in Louisville, Kentucky, at
1-502-671-7312.
Batteries removed from this device must be recycled
or disposed of in accordance with local, national, and
regional regulations. Only trained technicians or qualified
building maintenance personnel should service Johnson
Controls products.
NAE-S Installation Guide
8
