Service manual

Always On UPS Systems Inc
77
Table 30.1 LED Operation for the 3P PCB
NORMAL ABNORMAL
PCB FUNCTION LOCATION
PCB
LED
LED
Illumination
Description
LED
Illumination
Description
SOLUTION
LED P1 Yes
Inverter output is within
normal parameters
No
Inverter operating, transfer
from inverter has failed
Replace the board
3P
Static Switch Driver
(R,S,T)
Static Switch
Module
LED P2 Yes
Reserve output is within
normal parameters
No
Inverter operating, transfer
from reserve has failed
Replace the board
Figure 30.3
Layout of one phase of the Static Switch Module