Fault Finding
20220752G 37
7 FAULT FINDING
If the instrument is part of an IS15 instrument system
including a Transceiver (IS15 Power Supply or Expander), or if
it is connected to another instrument system as a NMEA
repeater, then see the IS15 General Manual.
General Display and Communications Faults
Condition Probable Cause Action
All instruments have
blank displays.
No 12V Power
Supply.
Check that the ships instrument system
fuse(s) or circuit breaker(s) are not blown /
tripped.
Check the power supply wiring to the IS15
Transceiver.
Check the green LED lamp inside the
Transceiver indicating supply polarity OK.
(In order to remove the top cover to the
Transceiver first remove the six fastening
screws.)
Measure the voltage (10,8-15,6V)
Check the Roblink/power cable from the
Transceiver to the instruments.
Measure the voltage. Should be ≈ 18VDC.
Contact your dealer.
One instrument in
the middle of the
chain have blank
display
Instrument head is
defective.
Replace instrument (Perform master reset
and new setup).
One or more
instruments at the
end of a chain have
blank displays.
There is no Roblink/
supply to the affected
instrument (s).
Check the Roblink/power cable(s) to the
affected instrument(s).
Contact your dealer.
One or more
instrument(s) always
show ‘----’, with the
pointers of analog
instruments at their
zero positions.
No data is reaching
the affected
instrument(s).
Check the signal wiring to the affected
instrument(s).
Check Roblink data by entering the
Roblink test menu on a Combi instrument.
Wind data missing? See next page.
NMEA input data missing? See IS15
General Manual
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