User's Manual

Samsung CDMA BSS: Indoor BTS Installation Manual
57
BSS Version 4, Document V4D0001 release 0.5, Indoor BTS Installation Manual, release 2.0
M If no, go to step 16.
2 Turn off all input power to the SBR rack.
3 Disconnect all GCRU power leads from the rear of the power control
panel.
4 Turn on input power to the SBR rack.
5 Reset the GCRU circuit breaker to on.
6 Did the circuit breaker trip again?
M If yes, go to step 7.
M If no, go to step 8.
7 A short circuit exists in the power control panel. Resolve fault, or
replace power control panel, then go to step 25.
8 Turn off all input power to the SBR rack.
9 Reconnect all GCRU power leads to the rear of the power control
panel.
10 Unseat both GCRU modules.
11 Turn on input power to the SBR rack.
12 Reset the circuit breaker to on.
13 Did the circuit breaker trip again?
M If yes, go to step 14.
M If no, go to step 15.
14 A short circuit exists in the backplane wiring to GCRU
modules.power control panel. Locate and resolve short circuit, or
replace backplane, then go to step 25.
15 A short circuit exists in one or both GCRU modules. Determine
which module is faulty and replace it. Then go to step 25.
16 Is the green LED above the circuit breaker on?
M If yes, go to step 21.
M If no, go to step 17.
17 Check main input power to power control panel.
18 Is main input power present?
M If yes, go to step 19.
M If no, go to step 20.
19 Problem exists in power control panel. Resolve fault, or replace
power control panel, then go to step 25.
20 Restore main input power, then go to step 25.
21 Do status LEDs on GCRU modules indicate correct status?
M If yes, go to step 25.
M If no, go to step 22.