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6. MAINTENANCE, TROUBLESHOOTING
6-4
6.3 Replacing the Fuse
The fuse at the rear of the processor unit and the display unit protects the
equipment from overcurrent and equipment fault. If you cannot turn on the power,
first check the fuse. Find the cause of the trouble before replacing the fuse.
WARNING
Use the proper fuse.
Use of a wrong fuse can result in damage
to the equipment or cause fire.
Ship’s mains and fuse to use
Unit Power Fuse to use
24 VDC 20A
100-115 VAC 10A
Processor Unit
220-230 VAC 5A
100-230 VAC 2A
Display Unit MU-201CR
24 VDC 5A
100-230 VAC 2A
Display Unit MU-231CR
24 VDC 6A
12 VDC 10A
Display Unit MU-170C
24 VDC 5A
Display Unit MU-231 100-230 VAC 1.5A
Display Unit MU-190 100-230 VAC 1 A
6.4 Replacement of Battery on GC Board
The battery installed on the GC (GyroCompass) Board inside the processor unit
preserves gyro data when the power is turned off. The life of the battery is about
five years. When the battery voltage is low, NG appears at the diagnostic test for
the GC Board. When this occurs, contact your dealer for replacement.
Battery on GC Board
Location of battery Battery type Code number
GC board CR 1/2 8.L 000-103-769