Appendix B - Troubleshooting
This troubleshooting guide assumes that you have
read and understood this manual.
It is possible in many cases to solve difficulties
without having to send the unit back to the
manufacturer for repair. Please follow this
troubleshooting section before contacting the
nearest NAVMAN dealer.
There are no user serviceable parts. Specialized
methods and testing equipment are required to
ensure that the unit is reassembled correctly and is
waterproof. Repairs to the unit must only be carried
out by a service centre approved by Navman NZ
Limited. Users who service the unit themselves will
void the warranty.
More information can be found on our Website:
Unit will not turn on:
Fuse blown or circuit breaker tripped.
Battery voltage is outside the range 10.5 to
16.5 V DC.
Power/data cable damaged.
Speed reading wrong or erratic:
Calibration is incorrect (see section 3-7).
Speed transducer cable unplugged or
SPEED 3100 log Installation and Operation Manual
Speed/temperature transducer fouled or
damaged. Check paddlewheel is aligned
fore and aft in the fitting. Remove
paddlewheel from fitting, check for fouling
or damage. Spin paddlewheel by hand,
check for a speed reading.
Speed transducer installed incorrectly or
transducer does not have a smooth flow of
clear water over it. Review installation.
Interference from electrical noise. Review
Temperature reading wrong:
Calibration is incorrect (see section 5-2).
Speed/temperature transducer cable
The word SIMULATE flashes at top, left of
screen, values displayed are unexpected:
Unit is in simulate mode (see section 2-4).
The display fogs:
Moist air has entered the breathing tube at
the rear of the unit. Air the boat or run unit
with backlight fully on.
Water has entered the breathing tube.
Return unit for service.