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Technical Helpline for assistance
Fault
Possible Causes
‘ERR’ on the top
line of all displays
No sensor connected
All displays have been set to ‘slave’ – one sensor must be set
to ‘master’
More than one display has been set to ‘master’
RS485_A & RS485_B have been reversed
NAVTEX
messages appear
to have blocks of 4
or 5 characters
missing
The termination has not been set correctly – see section 2.1.4
above
More than one display has been set to ‘master’
‘ERR’ on one
display but not on
all
Connections to that display are incorrect
12.4
User Serviceable Parts
There are no user-serviceable parts in the equipment. If a fault develops, the unit must
be returned to a dealer, service centre or direct to McMurdo.
12.5
Software Upgrade
The NAV6 has FLASH memory based software. This allows it to be upgraded when
new software releases are developed. Check our website
www.mcmurdo.co.uk
for
information on new releases.
12.6
Fuses
Input
The NAV6 has a built-in re-settable fuse on its 12 V input. This fuse will trip if the unit
draws excessive current. Power must be disconnected from the unit for 10 seconds in
order for the fuse to reset.
Sensor Output
The NAV6 has a built-in re-settable fuse on its sensor output power connector. This
fuse will trip if the sensor unit draws excessive current. The sensor unit power must be
disconnected for 10 seconds in order for the fuse to reset.
All manuals and user guides at all-guides.com
