User's Manual

SBS-900 Shore Based Radar Systems
Chapter 9: Planned maintenance
KH-1602-2 issue 1: Standard SBS900 Systems Operator & Maintenance Handbook
Page 96 of 240
SBS-900 Annual planned maintenance record sheet
Inspection sheet
9 of 10
Powered tests: Cooling fan checks
The following tests require access to the internal electronics within the Radar Distribution Unit and
the transceiver enclosure.
Caution: Lethal AC, DC and high voltages are present within the system. Exercise
extreme caution when carrying out the following checks.
RDU: There are two fans mounted within the RDU on the power supply assembly:
Task Description Pass Fail
Antenna
isolation
Isolate the 3-phase supply to the Radar Distribution Unit. ' '
RDU
fan
operation
- Open the door to the RDU.
- Visually confirm that the two fans on the dual redundant power
supply are running.
' '
Transceiver
enclosure
Where fitted, ensure that the SBS-A179 powered fan kits are
operational.
' '
Not fitted '