CVS-841/851
Chapter 8
Trouble Shooting
Chapter 8 Trouble Shooting
This chapter covers simplified fault locating procedures to assist the ship’s crew to locate a faulty
module as well as simple fuse replacement.
8.1 Information required for service
Please advise the following details:
(1) Name of vessel, Satcom number if available.
(2) Equipment type name
(3) Equipment serial number
(4) Software type name, shown on the standby screen.
(5) Next port of call, ETA and ship’s agent
(6) Faulty conditions and the result of on board check
8.2 Self check function
When the CVS-841/851 is first turned on, a system check program runs to diagnose system functions.
If the result is found normal, the message “System check OK” will appear on the screen. If this sign
does not appear, there is a possibility of system failure. Call for service.
8.3 Trouble shooting
The following table provides information about first line check schedules to locate a faulty area and
gives remedial measure(s), where applicable.
Table 7.1 Fault finding chart for CVS-841/851
Faults detected
Possible cause of the failure
Remedial action against negative
result
Equipment does not turn
on
1. Is the fuse blown?
2. Does the power supply voltage lie
within the rated range (10.8 – 31.2
VDC)?
3. Is the power cable firmly
connected to ship’s battery?
1. Replace the blown fuse with a
new one.
CAUTION: Make sure to turn
off the main supply before
attempting to replace the fuse.
2. Use a proper rated main
supply.
3. Reconnect the cable firmly to
the battery.
Equipment turns on with
beep but nothing shown
on the display.
1. LCD unit may be faulty.
2. Is the cable connection between
the transducer and display unit
firm and correct?
1. Call for service.
2. Check the cable for cut, short,
etc. and repair the cable if
necessary and reconnect.
93132682-01
8-1
