Samyung ENC SI-30A, Manual Instruction

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Rx Channel 1 malfunction
Rx Channel 2 malfunction
Rx Channel 70 malfunction
These messages indicate that there is a possible problem with the receiver for AIS channel A,
AIS channel B or the DSC channel 70 respectively. Again, the occasional occurrence of this
message should not be cause for alarm, but the regular occurrence of these messages is
likely to indicate a permanent problem which should be investigated by an authorised service
agent.
Transceiver connection lost
This message indicates that the SI-30A display unit can no longer communicate with the SI-
30A transponder. This may indicate a problem with the connections, or may indicate that the
transponder is no longer operating correctly. This fault should be investigated immediately. It
is important to note that there is a safety timer in the transponder which causes it to shut
down automatically if the transmitter should remain on for too long. In this event, the
transponder will shut down and this alarm will be raised by the display unit. The situation
can be resolved by disconnecting the power from the transponder for a short time and
then re-connecting it again.
External EPFS lost
This message indicates that the transponder is no longer receiving data from the vessel's on-
board GPS system. This message should be investigated immediately.
No position sensor in use
This message indicates that the SI-30A transponder is unable to obtain a location fix from
either the internal GPS module or from the ship's own GNSS system. This message may occur
during the first few minutes of operation while the transponder waits to obtain its location,
and may safely be ignored during this time. If the message occurs at any other time, it
indicates a possible problem with the GNSS antennae or wiring and should be investigated
immediately