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CHAPTER 8
SYSTEM MAINTENANCE
5. FAULT RECOVERY PROCEDURE
5.1 Before Starting Fault Recovery
After the fault diagnostics based on fault information such as the alarm and system messages, the next procedure
to be done is the fault recovery. Before proceeding to this, it is required to examine when it should be started by
comparing the emergency of repair and its influences. Particularly, when the fault is determined in the ST-BY
system, the work should be done at night when the ACD system is operated less frequently. The fault recovery
procedures can be divided into those on the ACD system and those on the MIS, as shown below.
Figure 8-4 Flow of Fault Recovery Procedures
5.2 ACD System Fault Recovery Procedures
See the Operation and Maintenance Manual for the fault recovery procedure related to the ACD system shown
below.
Fault information Collection
Paragraph 4.2 “Diagnostics from System Messages” in Section 4
ACD System Fault Recovery – See Section 5.2
MIS Fault Recovery – See Section 5.3
(1) ACDP of Fault - Fault occurs intermittently at ACT side
(2) ACDP of Fault - ST-BY side is faulty
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