Maintenance Handbook

SBS-800 Series Operator & Planned Maintenance Handbook
Chapter 9: Planned Maintenance
KH-1601-2 Issue 6
Page 67 of 80
MAN ALOFT SWITCH
Task
Description
Pass
Fail
Physical
inspection
Ensure that all fastenings are secure and show no signs of severe
corrosion or damage.
☐
☐
Switch
action
Ensure the switch operation is smooth and that both the Free and
OFF positions can be selected.
☐
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Earth
bonding
and
continuity
Test the earth bonding conductivity by attaching one lead of the test
equipment
note
to chassis/earth and the other to an unpainted part of
the equipment under test.
Check the earth bonding for continuity, resistance should not exceed
0.1 ohms. If test fails, investigate the bonding, rectify and repeat the
test.
Note: Safety ohmmeter, Bridge Megger or Multimeter.
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COMPLETION OF MAINTENANCE TASKS
CAUTION
SWITCH ON SAFETY NOTICE
Observing all health & safety precautions, on completion of the planned maintenance and noting that
the following will cause antenna rotation and possible system transmission, restore AC power
and control to the system and test as follows:
Security
switches
Place the Antenna rotation keyswitch and Man Aloft Switch in the
FREE positions.
Antenna
rotation
☐
Man aloft
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AC Breakers
Restore AC power to the system
Switch the Single Phase AC and Antenna Motor AC supply breakers
within the RDU ON.
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Local control
test
With the RDU switches set to Local control test the system to ensure
full functionality.
☐
Remote
control
test
Place the Remote/local switch on the RDU to the Remote position
and test the system to ensure full functionality.
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