Fault Detection And Locating; Overlay Programs; Alarm Indications; Fault Locating - Northern Telecom Meridian SL-1 Reference Manual

Fault detection and locating

Overlay programs

Alarm indications

Fault locating

Fault-clearing procedures

Overlay programs are used to detect most faults in the QCA146 cabinet.
These programs are described in 553-2741-500 (X08) or 553-2931-500
(X11 Supplementary Features).
RPE related alarms are described in 553-2741-500 (X08) or 553-2931-500
(X11 Supplementary Features). Table 2-A of this Appendix gives the alarm
indications and causes that are unique to the QCA146 cabinet and are not
necessarily caused by a fault in the RPE.
Table 2-B gives a cross-reference of fault indicators and associated fault
type. Some faults may be cleared simply by using Table 2-A. Others are
cleared by using the appropriate chart for the type of fault indicated in
Table 2-A.
The following charts describe the procedures to follow to clear faults in the
cabinet.
• CE/PE Breaker Trips on QUX19 Unit - Chart 2-1
• AC BRKR or AC POWER Breaker Trips on -48 V Rectifier - Chart 2-2
• PE2, PE3, PE4 Or PE5 Breaker Trips - Chart 2-3
• FN Fuse Operates or LN LED is Extinguished - Chart 2-4
2-Mb/s Remote Peripheral Equipment
2-1 of 9 pages
Appendix 1 to 553-2741-500