Lowrance electronic 540c Baja User Manual

Page 21

interference, or if such a switch is not available, we recommend
connecting direct to the battery and installing an in-line switch.
This will let you shut off power to the power cable when the unit is
not in use. When you are not using the unit, you should always
shut off power to the power cable, especially when the power cable
is disconnected from the unit.

WARNING:

This product must be independently fused with the en-
closed 3-amp fuse (or equivalent), even if you connect to
a fused accessory or power bus.
If a malfunction happens inside the unit, extensive dam-

age can occur if the enclosed fuse is not used. As with all

electrical devices, this unit could be damaged to a point

that it is unrepairable and could even cause harm to the

user when not properly fused.
Failure to use a 3-amp fuse will void your warranty.

If possible, keep the power cable away from other boat wiring, especially

the engine's wires. This will provide the best isolation from electrical

noise. If the cable is not long enough, splice #18 gauge wire onto it.
The display power cable has three wires, white, red and black. Red is the

positive (+) lead, black is negative (–) or ground. The white wire is un-

used by your unit and should be capped. Make sure to attach the in-line
fuse holder to the red lead as close to the power source as possible.
For example, if you have to extend the power cable to the power bus or

battery, attach one end of the fuse holder directly to the power bus or

battery. This will protect both the unit and the power cable in the event

of a short.
This unit has reverse polarity protection. No damage will occur if the

power wires are reversed. However, the unit will not work until the

wires are attached correctly.