Hi fish iv sent you this info i hope it helps if you require anymore info let me know

1.11 Main thyristor (dynamic)

The charge indicator shows: STOP
A:14

The system is lock off if the main thyristor is conductive on activation of the system.The voltage at 33 is evaluated to enable detection of this fault. Voltages in excess 95% of the battery voltage are considered to be faults.

Possible cause of the fault
1. Defective main thyristor.
2 Defective off thyristor.
3 Defective capacitor block

1.12 Main thyristor (static)

The charge indicator shows: STOP
A:14

The main thyristor is checked every time before a direction of the travel relay is activated.
Refer to section 1.11 for details of the possible cause of the fault.