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ND-70895 (E) CHAPTER 6
Page 93
Revision 1.0
MAINTENANCE
Fault Diagnosis
4.2 Diagnosis from System Messages
The flow of works from diagnosis of system message up to discovery of the cause of the fault is shown in
Figure 6-3.
Figure 6-3 Flow of Diagnosis out of System Messages
Diagnosis from System Message
Identification of Faulty Card, Faulty Equipment
Check the cause of the fault by diagnosing the printed out system messages.
If, during the diagnosis, an alarm such as circuit card initialization, etc., has been indicat-
ed, reset (clear) the alarm indication by depressing ALM RST key on the frame-top alarm
panel.
If, as a result of the diagnosis, the fault is a temporary one, cancel all alarm indications
and release system messages stored in the memory by RALM command and keep
watching the system operations thereafter.