Chapter 25 — Fault locating and clearing
Page 473 of 536
Option 11C Compact
Planning, Installation, Fault Clearing and CCBR Guide
Symptom:
Circuit breaker on the power supply in the cabinet is on but all
LEDs in the cabinet are off
All the LEDs in the cabinet are off but the circuit breaker on the Power Supply
Unit in the cabinet is not tripped. Use this procedure to clear the problem.
You may need to replace the:
•
NTMW11 power supply
•
Main AC Power Supply Cord
•
Uninterruptible Power Supply (UPS)
Possible cause
Action
Main Power Cord not
connected
If the main power cord for the cabinet is unplugged, plug it in. Check
both ends of the cord to make sure that it is also plugged in to the
power supply unit.
If the power cord is already plugged in, go to the next possible
cause.
WARNING
The following tests are performed on a live power connection.
No power at outlet
With a meter or test lamp, test for power at the outlet.
If there is no power at the outlet when AC power is supplied through
a UPS unit, repair or replace the UPS following the manufacturer's
instructions.
If there is no power at the outlet when AC power is supplied through
commercial service (not through a UPS), take the necessary steps
to have the commercial power restored.
If there is power at the outlet, go to the next possible cause.
Defective Main Power
Cord
With a meter or test lamp, test the cabinet end of the main power
cord (at the bottom of the Power Supply Unit in the cabinet) for
power.
If there is no power, replace the power cord.
If there is power at the connections, go to the next possible cause.
Defective Power Supply
Unit
Replace the NTMW11 Power Supply Unit.
Содержание Meridian Meridian 1
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Страница 17: ...xiv Contents 553 3121 210 Standard 3 0 January 1999 ...
Страница 89: ...Page 70 of 536 Chapter 6 Bracing cabinets against earthquakes 553 3121 210 Standard 3 0 January 1999 ...
Страница 97: ...Page 78 of 536 Chapter 8 Installing a new system 553 3121 210 Standard 3 0 January 1999 ...
Страница 107: ...Page 88 of 536 Chapter 10 Installing the system ground 553 3121 210 Standard 3 0 January 1999 ...
Страница 113: ...Page 94 of 536 Chapter 11 Installing the power supply 553 3121 210 Standard 3 0 January 1999 ...
Страница 125: ...Page 106 of 536 Chapter 12 Adding an expansion cabinet 553 3121 210 Standard 3 0 January 1999 ...
Страница 139: ...Page 120 of 536 Chapter 13 Installing the circuit cards 553 3121 210 Standard 3 0 January 1999 ...
Страница 157: ...Page 138 of 536 Chapter 15 Installing and connecting SDI and Ethernet ports 553 3121 210 Standard 3 0 January 1999 ...
Страница 175: ...Page 156 of 536 Chapter 16 Starting up and testing the system 553 3121 210 Standard 3 0 January 1999 ...
Страница 209: ...Page 190 of 536 Chapter 18 Connecting the trunks 553 3121 210 Standard 3 0 January 1999 ...
Страница 323: ...Page 304 of 536 Chapter 21 Installing Hospitality 553 3121 210 Standard 3 0 January 1999 ...
Страница 419: ...Page 400 of 536 Chapter 23 Pre programmed data 553 3121 210 Standard 3 0 January 1999 ...
Страница 455: ...Page 436 of 536 Chapter 24 Changing pre programmed data 553 3121 210 Standard 3 0 January 1999 ...
Страница 555: ...Page 536 of 536 Chapter 25 Fault locating and clearing 553 3121 210 Standard 3 0 January 1999 ...