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24. MAINTENANCE AND TROUBLESHOOTING
24-3
24.2 How to Replace the Fuses
The fuse in the Power Supply Unit, Processor Unit, monitor unit and sensor adapter
protects those units from overvoltage (overcurrent) and internal fault. If a unit cannot
be turned on, check if its fuse has blown. If the fuse has blown, find out the cause be-
fore replacing the fuse. If the fuse blows again after replacement, contact your dealer
for advice.
3 to 6 months Cabling Check that all cabling is firmly
connected and is not dam-
aged.
Exposed bolts and
nuts of antenna unit
Exposed bolts and nuts are
subject to corrosion. Further,
they may loosen by vibration.
Check that bolts and nuts
are not corroded and are se-
curely fastened. If corroded,
clean and coat with anticor-
rosive sealant.
Radiator Dust, dirt and salt deposits on
the radiator cause signal at-
tenuation, resulting in loss of
sensitivity. Wipe radiator with
a freshwater-moistened cloth.
The radiator is made of fiber-
glass reinforced plastic.
Therefore, do not used gas-
oline, benzene and the like
to clean the radiator.
If the radiator is iced, use a
wooden or plastic headed
hammer to remove the ice.
DO NOT use a steel ham-
mer.
Terminals, connec-
tors
Check that all terminals and
connectors on circuit boards
are securely fastened.
Have a qualified technician
check terminals and connec-
tors.
6 months to 1
year
Screws on terminal
boards in Proces-
sor Units
Check that all screws are
tightly fastened.
Have a qualified technician
check screws.
Unit Power supply Type Code no.
Power Supply Unit PSU-014 100-230 VAC F1: FGBO 250V 7A PBF 000-178-084-10
Power Supply Unit PSU-015 100-230 VAC F1: FGBO 250V 3A PBF
F2: FGBO 250V 7A PBF
000-155-841-10
000-178-084-10
Power Supply Unit PSU-016 100-230 VAC F1: FGBO 250V 5A PBF 000-155-840-10
Power Supply Unit PSU-018 100-230 VAC F1: FGBO 250V 3A PBF
F2: FGBO 250V 7A PBF
000-155-841-10
000-178-084-10
Monitor Unit MU-190 100-230 VAC FGBO 250V 1A PBF 000-155-828-10
Monitor Unit MU-231 100-230 VAC FGBO 250V 1.5A PBF 000-155-833-10
Processor Unit EC-3000 100-115 VAC FGMB 125V 10A PBF 000-157-470-10
220-230 VAC FGMB 250V 5A PBF 000-157-570-10
Sensor Adapter MC-3000S 24 VDC FGMB 125V 3A PBF 000-157-481-10
Interval Check point Check and measures Remarks
Use the proper fuse.
Use of a wrong fuse can damage the
equipment or cause fire.
WARNING