NorthStar Navigation GM1708 961XD - Manual (Page 45)

SECTION TWO - Installation
961 INSTALLATION MANUAL Revision A Page 35
PROCESSOR
(cont’d)
System lock-ups Vibration-related:
The system locks up while underway under
certain conditions. Systems tend to lock up
on those vessels that are 35-55 feet in
length with varying beam widths, having
twin large displacement engines, moving
approximately 20 to 35 knots, and with their
processors installed at/or below the water-
line and close the outside hull. • Vibration induced into the hull and
surrounding structure from the engine
and the running gear.
• The action of the waves against the
hull while the vessel is underway at a
medium-to-high rate of speed.
• Cavitation of the water pumps in jet
boat propulsion systems.
• Incorrect installation practices, includ-
ing improperly fitted lower attachment
clips for the internal hard drive
assembly. If this is the case, to rem-
edy the problem, ensure that the tabs
are engaged and tightly secured in
their respective slots on the
power-supply frame so that the bot-
tom of the drive mounting bracket is
properly restrained. Use the mounting
bracket with the ME500-series vibra-
tion mount.
PROCESSOR
(cont’d)
System lock-ups Hardware-related:
The system locks up on a random basis with
no apparent pattern. • Ensure that the processor internal
cooling fans are operating and that
the processor is not overheating. If
you can not comfortably place your
hand on the top of the processor
when it is operating then it is most
likely overheating and the reason
needs to be determined and cor-
rected. Make sure that the compart-
ment where the processor is mounted
has adequate ventilation to prevent
heat build up.
Table 2: Troubleshooting the installation (continued)
Problem Area Symptom Possible Solutions/Reasons