Furuno DRS4W, Operator'S Manual, Page: 14 / 36

8
2. MAINTENANCE,
TROUBLESHOOTING
2.1 Maintenance
Regular maintenance is important for good
performance. Check the points mentioned be-
low every 3 to 6 months to keep the radar sen-
sor in good working order. Observe the safety
instructions at the front of this manual when
working on the mast.
2.2 Replacement of
Fuse
The 5A fuse (Type: FGBO 250V 5A PBF,
Code No.: 000-155-840-10) in the fuse holder
on the power cable protects the radar sensor
from overcurrent and equipment fault. If you
cannot turn on the power, check the fuse to
see if it has blown. If the fuse has blown, find
the reason before you replace the fuse. If the
fuse blows again after the replacement, con-
tact your dealer for advice.
WARNING
DO NOT OPEN THE SENSOR.
Electrical shock hazard
There are no user-serviceable parts
inside. Only qualified personnel are
allowed to work inside the equipment.
Check point Action
Check fixing
bolts for corro-
sion and if tightly
fastened. Tighten loosened bolts.
Replace corroded bolts.
Coat new bolts with marine
sealant.
Check radome
for cracks,
foreign material. If a crack is found, repair it
temporarily with a small
amount of sealing com-
pound or adhesive. Bring
the unit to your dealer for
permanent repairs.
Foreign material on the
radome can cause a
considerable drop in sensi-
tivity. Remove foreign
material with a freshwater-
moistened cloth. Do not
use commercial cleaners to
clean the sensor; they can
remove paint and markings
or deform the plastic.
Do not apply paint, anti-corrosive sealant
or contact spray to coating or plastic parts.
Those items contain organic solvents that can
damage coating and plastic parts.
NOTICE
WARNING
Use the proper fuse.
Use of the wrong fuse can damage the equip-
ment or cause fire.