Failure Mode Operation
This mode allows the locomotive to operate even if the angle transmitter of the TE/BE throttle has failed.
In this mode, driving and electrical braking are controlled by the auxiliary contacts on the TE/BE throttle.
Driving in failure mode
Driving in failure mode becomes necessary if the difference between auxiliary contacts and the absolute value of the angle transmitter is greater than 25% of the full range because of a defective master controller.
The following steps are initiated with a time delay of 2 sec:
1. Traction is set to 0 by the MCE.
2. A priority 2-fault message is displayed.
3. The driver must now move the rotary switch “152-Failure Mode Operation” in the machine room (SB1) into position ‘1’. This deactivates the angle transmitter.
4. The driver must move the TE/BE throttle into position “0”.
5. The driver must acknowledge the fault message.
6. The driver can now select a new TE/BE throttle value carefully. Position‘0’-Fine control though out the range by angle transmitter. Position ‘1’-fine control in steps though auxiliary contacts.
Loco Brake Testing:
1) Apply loco brakes by SA-9
2) Ensure that brake cylinders registered 3.5kg/cm2 pressure in WAG9 & 5 Kg/CM2 disk brake pressure in WAP5.
3) Release parking brakes and release A-9.
4) Operate MPJ to forward.
5) Move throttle in traction and give 45 % or 150 KN tractive effort in WAG9 & 30% or 100 KN. tractive effort in WAP5.
6) Loco should not be moved.
Note:- Presently there is no procedure for loco brake testing approved by RDSO. Same to be confirmed by RDSO or CLW
