User Manual for the Type 8300 Compatt 6
(and Variants)
UM-8300-Compatt 6
Issue B3
Fault
Possible Cause
Action
Transponder replies to
commands, but not
interrogations.
Transponder disabled.
Check by reading the transponder CS reply.
EC1 indicates the transponder is enabled for CIS
interrogations.
EC0 indicates it is disabled.
The incorrect CIS signal.
Check the transponder CS reply.
Battery capacity is below
5%.
Check the capacity remaining as reported by the VS reply.
Send a Secure Configuration (SC) command to override,
release and recover the transponder. Replace the battery.
Transponder may have
been moved from original
position.
Move the transponder.
Transponder replies to
commands, but
telemetry errors are
detected.
Noise level at surface
transducer too high.
Lower the dunking transducer / transceiver or towfish and
reduce the surface transceiver gain.
Do a noise check using the applicable transceiver noise
check command.
Set the transponder to high power telemetry transmission
using the TPL parameter in the CS command.
Other acoustic systems
maybe operating in the
same frequency band.
Check for signals validating by using the noise command
on the surface transceiver.
Section 11 – Fault Diagnosis
85