Fault Finding - Kongsberg SIMRAD IS15 Manual

8 FAULT FINDING

This chart assumes that the instrument is part of an IS15
instrument system including an IS15 Transceiver, or an IS15
Power Supply or Expander. If it is connected to another
equipment as a NMEA repeater, then perform the equivalent
checks on that equipment.
General Display and Communications Faults
Condition
All instruments have
blank displays.
One instrument in
the middle of the
chain have blank
display
One or more
instruments at the
end of a chain have
blank displays.
20220760I
Probable Cause
No 12V Power
Supply.
Instrument head is
defective.
There is no Roblink/
supply to the affected
instrument (s).
Action
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.
Replace instrument (Perform master reset
and new setup).
Check the Roblink/power cable(s) to the
affected instrument(s).
Contact your dealer.
Fault Finding
107