Bedienungsanleitung Navman FISH 4200 (Seite 27 von 32) (Englisch)

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27FISH 4200 Installation and Operation Manual

NAVMAN

This troubleshooting guide is written with the

assumption that the user has read and understood

the relevant sections in this manual.

It is possible in many cases to solve difficulties

without having to send the display unit back to the

manufacturer for repair. Please follow this

troubleshooting section before contacting the

nearest NAVMAN dealer.

There are no user serviceable parts. Specialised

methods and testing equipment are required to

ensure that the display unit is reassembled correctly

and is waterproof. Users who service a NAVMAN

fishfinder themselves will void the warranty.

Repairs to the FISH 4200 may only be carried out by

a service centre approved by NAVMAN NZ. If the

display unit must be sent into a service centre for

repair, it is essential to send in the transducer(s) at

the same time.

More information can be found on our Website:

www.navman.com

1. The fishfinder won't turn on:

a) NAVMAN fishfinders are designed to operate

on 12 volt battery systems, where the voltage

may vary from 10 to 16.5 volts. If an excessive

voltage is supplied to the unit, a resettable fuse

will be tripped, turning the display unit off.

b) Check that the power cable LT connector at

the back of the display unit is securely plugged

in and the collar is locked in place. The collar

must be secure for watertight connection.

c) Measure the battery voltage while the battery is

under load - turn on some lights, radio, or other

electrical equipment connected to the battery. If

the voltage is less than 10 volts:

- the battery terminals or wiring on the

terminals may be corroded.

- the battery may not be charging correctly or

may need replacing.

d) Inspect the power cable from end to end for

damage such as cuts, breaks, or squashed

sections.

e) Ensure that the red wire is connected to the

positive battery terminal and the black wire to

the negative battery terminal. If wired for the Auto

Power option, ensure the yellow wires are

connected to ignition circuit. Also check the boat's

main switch circuit. See section 5-4.

f) Check for corrosion on the power cable LT

connector and clean or replace if required.

g) Check fuses that are placed in line with the

power cable. A fuse can be blown despite

appearing to be good, or the fuse may be

corroded. Test the fuse or replace it with a fuse

known to be good.

2. The fishfinder won’t turn off:

The fishfinder may have been wired with the

Engine Hours feature enabled. In this case, the

fishfinder cannot be turned off while the ignition

power is on. See Auto Power Wiring in section

5-4.

3. The fishfinder operates erratically:

a) Check that the transducer does not have debris

(e.g. weed, plastic bag) caught around it.

b) The transducer may have been damaged

during launching, running aground, or running

underway with debris etc. If the transducer has

been impacted, it may have been kicked up on

the bracket. If it is not physically damaged,

reset the transducer back to its original

postion. See the Transducer Installation Guide

for more information.

c) When in water less than 2 feet (0.6 m) the

bottom and depth readings may become

inconsistent and erratic. This depth is

measured from the transducer and does not

allow for any keel offset setting.

d) Manual Gain may be set too low, which may

cause weak bottom echo, or no fish signals. If

Auto Gain is disabled try increasing the gain.

e) Ensure the back of the bottom surface of the

transducer is slightly lower than the front and

the front is as deep in the water as possible in

order to minimise the generation of bubbles

through cavitation. See the Transducer

Installation Guide for more information.

f) Check the transducer and power cable LT

connectors at the back of the display unit are

securely plugged in and the collar is locked in

place. The collar must be secure for watertight

connection.

g) Inspect the transducer and power cables from

end to end for damage such as cuts, breaks or

squashed sections.

h) Ensure there is not another fishfinder or depth

sounder turned on, which may interfere with

the FISH 4200.

i) Electrical noise from the boat's engine or an

accessory may be interfering with the

transducer(s) and/or the NAVMAN fishfinder.

This may cause the fishfinder to automatically

decrease the gain unless using Manual Gain.

The fishfinder thus eliminates weaker signals

such as fish or even the bottom from the

display. This may be checked by switching off

other instruments, accessories (e.g. bilge

pump) and the motor until the offending device

Appendix B - Troubleshooting

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