Vector-LP Radio Beacon Transmitter Technical Instruction Manual
Page
5-1
Section 5 Maintenance and Troubleshooting
Issue 1.1
Vector-LP Radio Beacon Transmitter
TECHNICAL INSTRUCTION MANUAL
Section 5
MAINTENANCE AND TROUBLESHOOTING
5.1 GENERAL
This section contains scheduled and
corrective maintenance information for the
Vector-LP transmitter. Fault symptoms
should be analyzed to determine the
corrective action required. Troubleshooting
information (see paragraph 5.5) is
presented based on the exciter panel’s
diagnostic information.
CAUTION
The Vector-LP transmitter contains many
solid state devices that may be damaged if
subjected to excessive heat or high voltage
transients. Ensure circuits are not
overdriven or disconnected from their loads
while turned on.
5.2 SCHEDULED MAINTENANCE
Scheduled maintenance consists of
performing a visual inspection of the
transmitter at scheduled intervals. The
recommended minimum time between
scheduled maintenance visits is one year.
Local operating and environmental
conditions may dictate more frequent visits
and in remote sites, less frequent visits
may be acceptable. Experience and
system reliability will determine the most
practical schedule for a specific installation.
5.2.1 Cleaning the Transmitter
As a minimum, perform the following
cleaning procedures:
NOTE
A site located in a dirty area using open-air
cooling requires more extensive cleaning
than a site located in a clean area using
closed-air cooling.
x
Once a year, clean the transmitter
using a vacuum cleaner and a soft-
bristle brush to remove loose dirt. Use
clean, damp rags to remove dirt that
cannot be vacuumed. NEVER use
compressed air to clean the
transmitter.
x
For VR250 transmitters only: Once a
year, inspect and clean air filters using
soap and warm water. If the air filters
are damaged, replace them as soon as
possible.
5.2.2 Checking Hardware
All hardware MUST be checked at least
once a year. Thermal cycling from turning
the transmitter on and off will require more
frequent checks.
x
Ensure the proper sized tools are used
to prevent damaging the hardware. In
most cases, hardware is metric.
x
A mounting surface or terminal that
has changed colour indicates a loose
hardware connection.
x
Multi-stranded cables installed on
terminal strips MUST be re-torqued.
5.2.3 Battery Replacement
The transmitter's control/display PWB
contains a battery backup circuit that
provides a memory of alarm occurrences
during ac power failure. The battery
should be replaced at least once a year or
whenever the diagnostic display on the
exciter/control assembly’s front panel
indicates a ‘low NVRM battery’ message.
