Procedure 8.14: PERFORM COMMUNICATIONS MODULE/TIME-MULTIPLEXED SWITCH
FAN ALARM TESTS
OVERVIEW
CAUTION:
Do not remove fuses to simulate fan alarms. The RESET button on the fan unit power control board is
used to simulate a fan failure that results in system alarm responses.
This procedure checks the system responses for fan alarm circuits. The test provides for the fan alarms in the
communications module (CM) and the time-multiplexed switch (TMS). The test simulates a fan failure that causes a
momentary loss of power, by depressing the power
RESET
button on the fan unit control board. The exchange
indicators (alarms, reports, and display pages) are checked to verify the proper responses.
TEST FAN UNIT ALARMS
PROCEDURE
1.
At the master control center (MCC) terminal, type and enter:
115
Response
115 - COMMUNICATION MODULE SUMMARY
page displayed (CM2)
or
115 - MSGS/TMS SUMMARY
page displayed (CM1).
2.
Select the CM cabinet to be tested.
3.
At the rear of the selected CM cabinet, open the door to access the fan unit.
4.
Visually locate the
RESET
button and red light-emitting diodes (LEDs) that indicate fan unit status.
5.
Push and hold the
RESET
button for several seconds.
Response:
The red
FAN ALARM
LED lights.
The audible MAJOR alarm sounds.
The yellow
FAN ALARM
LEDs on the top front and rear bezels light.
At the MCC terminal, the MAJOR indicator lights and the CM indicator flashes.
On 115 Page display, the
FAN ALARM
indicator associated with the CM cabinet lights.
At the receive-only printer (ROP), the
REPT ALM FAN FS CM x
report is printed.
Where:
x
= Selected CM or TMS number.
6.
Release the
RESET
button.
Response:
The red
FAN ALARM
LED goes off.
The yellow
FAN ALARM
LEDs on top front and rear bezels go off.
At the MCC terminal, the CM indicator goes off (if all CMs are operational).
At the ROP, the
REPT ALM CLR FAN CM x
report is printed.
Where:
x
= Selected CM number.
7.
At the selected
CM x
cabinet, close the rear door.
235-105-210
October 1999
Copyright © 1999
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