Alstom MBCH - FLOWCHART 3; TP4 Voltage and Transformer T3 Check

26
Flowchart 3
Link terminals 26 and 27.
Inject In into terminals 25
and 28. Monitor TP4.
Monitor R1.
Inject In into terminals 25
and 28.
Conclusion:
Faulty transformer T3.
Conclusion:
Faulty pcb1
Conclusion:
Faulty pcb1, pcb2
or transformer T3.
Link terminals 24 and 27.
Inject In into terminals 23
and 28.
Conclusion:
relay appears to be
functioning correctly.
R1
voltage
correct
?
TP4
voltage
correct
?
TP4
voltage
correct
?
YES
YES
YES
YES
YES
YES
NO
NO
NO