Service manual

Always On UPS Systems
M0704_NX_Series_Service_Manual V2.17 2012-06-12 58
Table 20.1 LED Operation for the 3B PCB
PCB FUNCTION LOCATION
NORMAL ABNORMAL
SOLUTION
PCB LED
LED
Illuminated
Description
LED
Illuminated
Description
3B Power Supply PCB Module
LED B1,
B2, B3,
B4
All Yes PCB has power All No
All LED's of PCB
extinguished
Check fuse set behind PCB
holder and ensure cable
connections are secure and
correctly attached.
Replace the board
LED B6 Yes
The system is testing
the batteries
LED B7 Yes
The system is boost
charging the batteries.
LED B2
LED B4
LED B1
LED B3
LED B7
LED B6
Picture 20.1
3B PCB
(
Power Su
pp
l
y)