NEC NDA-24300 manual Routine Maintenance Procedures, Time Procedure Reference Section Remarks

ROUTINE MAINTENANCE PROCEDURE

2.ROUTINE MAINTENANCE PROCEDURES

This section explains general routine maintenance procedures to be performed on a daily, monthly, and quar- terly basis. Table 7-2lists each procedure according to the time each procedure is to be performed. Use the Reference Section to locate the detailed procedure.

Table 7-2 List of Routine Maintenance Procedures

TIME	PROCEDURE	REFERENCE SECTION	REMARKS
Daily	Check the temperature and relative humidity in	Section 2.1, Ambient Conditions
	the switch room.	in Switch Room Check
	Check to see if any of the alarm indicator lamps	Section 2.2, Alarm Check
	on the TOPU are lit.
	Check the operating status of the MAT and the	Section 2.3, MAT/Printer Check
	printer, remaining quantity of paper, etc.
	Check to see if a system message indicating a	Section 2.4, Collection of Sys-
	fault is displayed.	tem Messages
	Check whether any station is in lockout state.	Section 2.5, Display of Locked-
		out Station
	Check whether the FANU is operating normally.	Section 2.6, Fan Unit Check
Monthly	Generate an alarm and check whether an indica-	Section 2.7, Alarm Tests
	tion appears on the TOPU.
	Check the conditions of the rectifier and batteries.	Section 2.8, Main Power System
		Check
	Check trunk circuits individually. Also check the	Section 2.9, Trunk RGU Check
	RGU circuit in the PWR Supply of each
	Module.
	Check each operation and lamps of DESKCON/	Section 2.10, ATTCON/
	ATTCON.	DESKCON Check
Quarterly	Check the CPU, TSW, and line/trunk Port Micro-	Section 2.11, System Check
	processors (PMs).

NDA-24300CHAPTER 7

Page 497

Issue 1