22. Maintenance and Troubleshooting
22-4
Replacing the fuse
The fuse at the back of the processor units protects the system from overcurrent and internal fault. If the power
cannot be turned on, check if a fuse has blown. If it has blown, find out the cause before replacing the fuse. If it
blows again after replacement, contact your dealer for advice.
Unit Power Fuse to use
Radar
24 VDC 20A
100-115 VAC 10A
Radar Processor Unit RPU-016
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
Chart Processor Unit
Chart Processor Unit EC-1000C 100-230 VAC 5A
Replacing the battery
Radar
The GC (Gyro Converter) board in the radar processor unit carries a battery which backs up data. The life of the
battery is about five years. When the battery has expired, the self test for the battery shows "NG". When this
happens have a qualified technician replace the battery.
Location of battery in
radar processor unit
Type Code No.
GC Board CR 1/2 8.1 000-103-769
Chart Processor Unit
The PCI-951-5S-RS-R40 circuit board in the processor unit contains a lithium battery that preserves data when the
power is turned off. When the voltage of the battery is low the time is wrong, all default settings are restored, etc.
When this occurs, have the battery replaced by a qualified technician, at your earliest convenience.
Location of battery in
chart processor unit
Type Code No.
PCI-951-5S-RS-R40 CR2032 001-007-990
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