NEC ND-71762(E) system manual Start

MAINTENANCE PROCEDURE

(5)Diagnostic Work

START

When system message 13-C is FAULT SUPERVISION displayed once or twice

When system message 13-C is displayed sporadically

Even if the CCH/CCT is stopped, FAULT it does not affect the system.

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If the CCH/CCT is stopped, it affects FAULT

the system.￿

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When system message 13-C is FAULT displayed cyclically

:CCH/CCT circuit card is faulty. Paragraphs 3.3 or 3.4

:Place the CCH/CCT into make-busy state during daytime, and replace the CCH/CCT card with spare.

Paragraphs 3.3 or 3.4

: CCH/CCT circuit card is faulty.

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END

Paragraphs 3.3 or 3.4

ND-71762 (E)CHAPTER 8

Page 95

Issue 2