Service manual

Always On UPS Systems Inc
60
Table 21.1 LED Operation for the 3C PCB
NORMAL ABNORMAL
PCB FUNCTION LOCATION
PCB LED LED Illumination Description
LED
Illumination
Description
SOLUTION
Ensure cable connections are secure
and correctly attached.
Check the input power
LED C1 Yes Rectifier Enabled No
PCB has no input
power or input power
outside of operating
parameters
Replace the board
Ensure cable connections are secure
and correctly attached.
3C
Rectifier Control (It is
separated into 3CC
and 3CD board for the
option of 12 pulse)
PCB Module
LED C2,
C3
All Yes PCB has power All No
PCB has no input
power
Replace the board
LED C1
LED C2
LED C3
Picture 21.1
3C PCB (6 Pulse Rectifier Driver)
Picture 21.2
3C and 3CC PCB (12 Pulse Rectifier Driver)
LED C1
LED C2
LED C3