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Priority A: Carry out immediately
B: Carry out at periodical inspection
× C: Carry out upon client’s request
D: Information and news
1. Subject
DC Breaker addition
2. Objective Equipment
NCU-331E/F/G GMDSS CONSOLE and NCU-692 PA RACK shipped before September, 2004.
3.
Outlines
The objective NCU-331 GMDSS CONSOLE or NCU-692 PA RACK stops charging ship’s battery
when turning off AC switch on it, but could not stop supplying battery power to peripheral equipment
such as VHF radios even when turning off DC switch mounted next to the AC switch. As the result,
the ship’s battery may be consumed and its voltage may drop according to the operating condition of
the peripheral equipment.
As the countermeasures against this problem, add the DC breaker switch using “Breaker kit” if
required. The kit is available by contacting SERVICE GROUP (PARTS TEAM) of MARINE SERVICE
DEPARTMENT with the following code.
Breaker Kit for NCU-331 made from JRC （Stock code: 7KDJD0001）
Breaker Kit for NCU-692 （Stock code: 7KDJD0002）
Breaker Kit for NCU-331 made from MRC （Stock code: 7KDJD0003）
4. Attached document
NCU-331 DC Breaker Addition procedures
NCU-692 DC Breaker Addition procedures
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