Service manual

Always On UPS Systems
M0704_NX_Series_Service_Manual V2.17 2012-06-12 64
Table 23.1 LED Operation for the 3T PCB
PCB FUNCTION LOCATION
NORMAL ABNORMAL
SOLUTION
PCB LED
LED
Illumination
Description
LED
Illumination
Description
3R
Communication
Interface
PCB Module LED R1 Yes PCB has power No
Interface
communication failure
Ensure cable connections are
secure and correctly attached.
Replace the board
LED R1
Picture 23.1
3R PCB
(
Communications Interface
)