Selco WU21 - Internal diagnostic indications (Pre-regulator PCB)

Note: all the above auxiliary power supplies are generated within Pre-regulator PCB (on the basis of + 26Vdc Main Internal power
supply coming from Input Filter 15.14.269!)
Led
L1
L2
L3
L4
L5
L6
L7
Status under normal conditions
LIT
LIT
LIT
LIT
LIT
LIT
LIT
Meaning
-20Vdc Secondary Inverter Driver power supply
+ 20Vdc Secondary Inverter Driver power supply
-20Vdc Secondary Inverter Driver power supply
+ 20Vdc Secondary Inverter Driver power supply
+ 15Vdc Aux. power supply
(+ 400Vdc to HF and Superimposition PCBs)
+ 15Vdc Aux. power supply
(insulate commands to HF and Superimp. PCBs)
+ 10Vdc Aux. power supply (not used)
Description of diagnostic indications 33