NORTHROP GRUMMAN NAVITWIN IV, Operation, Installation And Service Manual

Page: 68 / 164

056360/E NAVITWIN IV
4-16 Alarm messages
128 MAG VAR FAIL
COMPASS
NAME
(magnetic varia-
tion failure) No valid magnetic
variation data
received in mag-
netic variation auto
mode. Acknowledge the
alarm.
Check whether the
magnetic variation
source provides valid
data to the gyrocom-
pass.
If necessary, change to
manual variation
mode.
129 SPEED INVALID
COMPASS
NAME NAVIGAT X MK 1 &
X MK 2:
Speed data rejected
by gyrocompass‘
North speed error
correction routine. Acknowledge the
alarm.
If the error persists,
check whether the
speed data source pro-
vides valid data to the
gyrocompass.
If necessary, change to
manual speed mode.
NAVIGAT 3000:
Received speed
value is beyond set
maximum speed
value. Check GPS speed data.
Adjust maximum
speed value.
130 SYSTEM CONF.
COMPASS
NAME
(system configu-
ration) System configura-
tion failure. Check system configu-
ration settings.
Restart system.
131 ACCURACY
COMPASS
NAME Reduced accuracy
condition of NAVI-
GAT 3000 system
during sailing
mode. Re-align system.
132 SENSOR RESET
COMPASS
NAME Unintended reset of
sensor detected,
caused by e.g. inter-
ruption of power
supply. No corrective action,
sensor performs re-
alignment.
133 PLEASE ALIGN
COMPASS
NAME GPS data available
again, e.g. after GPS
blackout returning
fully operational. Re-alignment of sys-
tem recommended.
134 SW MISMATCH
COMPASS
NAME
(software mis-
match) NAVIGAT 3000 sen-
sor and IPSU soft-
ware do not match,
not finalized soft-
ware update Proceed / finalize soft-
ware update proce-
dure.
Error
-ID Displayed Mes-
sage Cause Corrective Action