NEC SV8500 Operation And Maintenance Manual - page 643
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CHAPTER 5
Operation Procedure for System with PIR
Table 5-1 Fault Repair Procedure Quick Reference (Continued)
FAULTY ITEM
FAULTY SITUATION
REFERENCE SECTION
Speech System Fault
Faults related to speech.
Section 4.5.2, Speech Path System
Fault - Fault Related to Speech
Dial tone is not heard.
Section 4.5.3, Speech Path System
STBY side is faulty.
Section 4.5.4, Speech Path System
Control System Fault
Fault occurs occasionally
at the ACT side.
Section 4.7.1, Control System Fault
- Fault Occurs Intermittently on
Alarm Indication Fault
Fault is not detected.
Section 4.8.1, Fault That Cannot Be
Power Supply Fault
Fuse for RGU/-48V has blown.
Section 4.9.2, Fuse Blown Fault
The circuit breaker of PWR supply is off.
Section 4.9.3, Circuit Breaker OFF
Alarm lamp on the PWR supply is lit.
Section 4.9.4, Fault of Alarm Lamps
Fan Unit Fault
• Fans are not activated even if the temperature has ris-
en higher than a predetermined degree.
• Fans are not activated even if the FAN START switch
is set to AUTO position.
Section 5-23, Circuit Diagram of
Tone Fault
Tone is distorted.
CCIS Line Fault
• A specific CCH/CCT card is faulty. When the signal
transmission line is a digital line, transmission/re-
ceiving of control signals cannot be performed.
• When the signal transmission line is an analog line,
transmission/receiving of control signals cannot be
performed.
Section 4.12.3, Specific CCH/CCT
Section 4.12.4, Fault of CCH, DTI
ISDN Line Fault
• A specific DCH/PRT card is faulty.
• When the signal transmission line is a digital line,
transmission/receiving of control signals cannot be
performed.
Section 4.13.3, Specific DCH/PRT