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8. MAINTENANCE, TROUBLESHOOTING
8-2
8.2 Replacement of Batteries
Battery on circuit board
A lithium battery (Type CR2450-F2 ST2L, Code No. 000-144-941) fitted on a circuit board
inside the processor unit preserves data when the equipment is turned off, and its life is
about three years. When its voltage is low the battery icon (
) appears at the top of the
display. When the icon appears, contact your dealer to request replacement of the battery.
WARNING
Ensurebatterypolarityiscorrect.
Wrongpolaritymaycausethebatteriesto
explode.
8.3 Replacement of Fuse
The fuse on the power cable protects the equipment from reverse polarity of the ship’s
mains and equipment fault. If the fuse blows, find out the cause before replacing it. Use the
correct fuse. Using the wrong fuse will damage the equipment and void the warranty.
1824C-BB, 1834C-BB: 7A for 12V device, 3A for 24V device
1934C-BB , 1944C-BB: 15A for 12V device, 7A for 24V device
1954C-BB, GD-1920C-BB: 3A for 12/24 V device
1954C-BB’s Power Supply Unit PSU-005: 15A for 12V device, 7A for 24V device
WARNING
Use the proper fuse.
Use of a wrong fuse can result in damage
to the equipment or cause fire.
189


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