– 645 –
CHAPTER 5 Operation Procedure for System with PIR
4.9 Power Supply Fault
This section explains the fault repair procedure when any of the faults shown in Table 5-9 occur.
4.9.1 Check Point
When repairing a power supply fault, consider the following items:
(1) Before checking the system, check the Rectifier, Battery, and Power cables.
(2) PWR circuit card is equipped with the circuits to supply ringing signal and howler tone. When a fault oc-
curs that causes the bell of the telephone not to ring, or howler tone cannot be heard, etc., check the alarm
lamp on the PWR circuit card.
Table 5-9 PWR Supply Fault Situation
FAULTY SITUATION REFERENCE SECTION
When the “RGU” / “-48V” Fuse has Blown Section 4.9.2, Fuse Blown Fault
DC-DC PWR Circuit Card Breaker OFF, Fault in PWR Supply
Section 4.9.3, Circuit Breaker OFF Fault in PWR
Supply
Fault of Alarm Lamps on DC-DC PWR Circuit Card Section 4.9.4, Fault of Alarm Lamps on PWR Supply
To Next Page
Loading...
