COMBA CriticalPoint BBU V2 - Troubleshooting; BBU Control Board Measurements

©20
2
1
Comba Telecom. All Rights
Reserved
.
568 Gibraltar Drive, Milpitas, CA 95035 | +1 408 526 0180 Ext 3 | www.combausa.com 9
Version 1.0.4
1.16.23
Troubleshooting
If annunciator does not power on or does not appear in BBU GUI after wiring has been confirmed, use a multimeter to
check the following pins for resistance and voltage according to the below instructions.
BBU Control Board Measurements (note BBU version when testing)
1. Turn on the BBU
2. Measure voltage from 1->3 and 2->3
1 to 3
~ 1.65 VDC
2 to 3
~ 1.65 VDC
1. Turn off the BBU
2. Unplug the three-wire jumper (V1 BBU) or disconnect the three data wire (V2 BBU) on the BBU control board
that feeds the annunciator panel
3. Measure the resistance from 1->3, 2->3, and 1->2
BBU V1 BBU V2
1 to 3 ~ 450 Ohms 1 to 3 ~ 2.2k Ohms
2 to 3 ~ 450 Ohms 2 to 3 ~ 2.2k Ohms
1 to 2 ~ 50 Ohms 1 to 2 ~ 130 Ohms
BBU V1
BBU V2