Nautel NX15, Troubleshooting Manual

Page: 21 / 274

NX25/NX15 Troubleshooting Manual Responding to alarms
Issue 5.0 2016-05-06 Page 1-13
Controller: High RF
Drive This alarm indicates the controller's RF Drive Duty Cycle meter
has risen above 60% for longer than 10 seconds. This alarm will
cause an exciter changeover, if automatic changeover is enabled
and the transmitter is operating on the main exciter. If there are
two exciters in the transmitter, swap exciter positions. If the alarm
follows the exciter, or there is only one exciter in the system,
replace the digital AM exciter PWB (see
“Digital AM exciter PWB
replacement” on page 1-55 ). If the alarm persists, or the alarm
remains with the position, replace the control/interface PWB (see
“Control/interface PWB replacement” on page 1-60 ).
Controller: Host Network
Down This alarm indicates the transmitter is configured to have
networking enabled, but the host is indicating there is no network
connectivity. If the transmitter is not connected to a network, the
alarm can be inhibited by changing the network settings to static
IP and setting the IP address to 0.0.0.0. If the transmitter is
connected to a network, verify the network settings are configured
properly, and the network cable is connected to the correct port on
the transmitter.
Controller: Host Not
Booted This alarm indicates that the controller has not received any
communication from the host since the last time the controller
booted (i.e., was powered up). The occurrence of this alarm is
normal for approximately one to five minutes while the host is
booting, immediately after ac power has been applied to the
transmitter. If this alarm continues to occur more than 30 minutes
after ac power has been applied to the transmitter, cycle (turn off,
then on) the ac power. If the alarm persists after 30 minutes,
replace the SBC or control/interface PWB (see
“Control/interface
PWB replacement” on page 1-60 ).
Controller: Host Not
Responding This alarm indicates that the controller has not received any
communication from the host in a set period of time. The
occurrence of this alarm is normal for approximately one to five
minutes while the host is booting, immediately after ac power has
been applied to the transmitter. If this alarm continues to occur
more than 30 minutes after ac power has been applied to the
transmitter, cycle (turn off, then on) the ac power. If the alarm
persists after 30 minutes, replace the SBC or control/interface
PWB (see
“Control/interface PWB replacement” on page 1-60 ).
Alarm (with Prefix) Description and Troubleshooting Action