User's Manual

SBS-900 Shore Based Radar Systems
Chapter 10: Corrective maintenance
KH-1602-2 issue 1: Standard SBS900 Systems Operator & Maintenance Handbook
Page 225 of 240
RDU LCD
Message
System status Description
Oil level
temperature
Information warning only; no change
in system performance.
The oil temperature in the CHL gearbox is high. At
the earliest safe opportunity, a general inspection
of the antenna should be made to see if there is
any reason for the elevated oil temperature.
The oil level should also be checked.
Over
temperature 1
Message received from
SharpEyeTM processor.
Transceiver switches to Low power
mode.
See note below
If the temperature of the RF power transistors in
the transceiver exceeds predetermined limits, the
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the Radar Distribution Unit and switches to the
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Over
temperature 2
Message received from
SharpEyeTM processor. Antenna
rotation and system transmission
will stop.
See note below
If the temperature exceeds a further pre-set limit
the transceiver switches to the fault state and
transmission is stopped.
Over temperature notes: As the SharpEye
TM
processor temperature returns to predetermined limits, the transceiver
returns to the degraded state and then to normal operation.
PSUA PWR
alarm
Depending on the fault condition the
system may operate normally or
antenna rotation and system
transmission may have stopped.
See
note below
Indicates a fault condition with one half of the dual
redundant power supply within the RDU or a
problem with AC input A (PL2).
If the fault is with the power supply, the system will
operator normally using PSUB outputs.
If AC input A has failed or is lost, power to the
transceiver will also be lost stopping antenna
rotation and system transmission.
PSUB PWR
alarm
Information warning only; no change
in system performance.
See note below
There is a fault with PSUB on the dual redundant
power supply within the RDU or a problem with the
AC input B (PL3).
The system will operator normally using PSUA
outputs.
PSU A or B PWR alarm notes: The cause of any power supply related alarms must be investigated at the earliest safe
opportunity and corrective action taken.
Safety current
I-loop open
Antenna rotation and system
transmission will have stopped.
The Safety current I loop is open.
Check that the Antenna Rotation, Man Aloft Switch
or any additional safety switches are in the FREE/
normally closed position.
Rx sensitivity
The system will be operational
however target detection may be
reduced.
If the minimum detectable signal rises above a pre-
set level the transceiver sends a receiver sensitivity
warning message.
Standby
Antenna rotation and system
transmission will have stopped.
The system is in standby mode, ensure that no
fault conditions exist that could be preventing the
system entering Run mode.
SYNTH
Message received from SharpEye
TM
processor.
Antenna rotation and system
transmission will have stopped.
The SharpEye
TM
processor synthesiser has not
initialised correctly. Cycling the power to the
transceiver may clear this condition.