Fault Recovery Procedure; Before Starting Fault Recovery; Acd System Fault Recovery Procedures - NEC Univerge SV8500 Programming Manual

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.
Paragraph 4.2 "Diagnostics from System Messages" in Section 4
ACD System Fault Recovery – See Section 5.2

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.
(1) ACDP of Fault - Fault occurs intermittently at ACT side
(2) ACDP of Fault - ST-BY side is faulty
Figure 8-4 Flow of Fault Recovery Procedures
Fault information Collection
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CHAPTER 8
MIS Fault Recovery – See Section 5.3
SYSTEM MAINTENANCE