Siemens Fault Finding Flashcards
What is the maximum permissible speed with deflated airbags in a Siemens train?
80km/h
At what MR pressure do the park brakes come on automatically?
350 kPa
In which car is the PA system MCB located?
DMA car
SIVs will not be able to start up if battery voltage falls below what kPa?
82v DC
At what MR pressure will the Compressor Fault light illuminate?
Below 850 kPa
True or false: air suspension of both bogies need to be isolated if there is a deflated air bag on one bogie of the car?
True
If a Siemens train fails to stable, which MCBs need to be checked? (3)
- Shutdown delay MCB
- Train stable/HSCB & light control MCB
- Cab Train Manned MCB
Where is the whistle isolating cock located?
Left side of driver’s foot panel
What brakes must be used on a Comeng train whilst rescuing a Siemens train?
Auto air brake
What should a driver do if there is a MR leak on a T car and the driver is unable to blank/isolate the leak?
Declare train disabled
Which MCB should be checked if multiple pantos fail to raise?
Panto Control MCB
Which MCBs will render the train disabled from the affected cab, if unable to reset? (3)
- Cab Train Manned MCB
- Safety Loop MCB
- Emergency Brake Valves
When assisting a Siemens with a Siemens to push it out of the section, how should the assisting train be set up in regards to trip and powering (6)
- Trip raised
- Trip MCB tripped
- Trip Cock ByPass Keyswitch turned
- VICERS bypassed
- Powering from this cab
- MAD button introduced
If you are a Siemens driver assisting from the rear, what should you do if you see an increment in brake cylinder pressure whilst powering?
Place Master Controller to Coast
Which MCBs should a driver check if CCTV is inoperative? (2)
- DC-DC Inverter, PA, PI display MCB (reset for fault rectification)
- CCTV Central Control MCB
How would you turn off an HVAC if there is a fire on board the train?
HVAC rotary switch on Fault and Status panel
What equipment will be affected if you lose MR on a motor car? (4)
- Friction brake
- Whistle
- Air Bags
- Park Brakes
What indication do you get if TCU is not functioning?
Reduced Performance Fault Light
What steps are required to isolate a defective pantograph? (4)
- Stable train
- Trip Panto Motor MCB
- Lower panto w/ handle if required
- Insert key and raise pantos
Which MCB controls the panto in that local car?
Panto Motor MCB
Below what MR pressure does the safety loop open?
600 kPa
Does EP brake come on automatically during loss of ED brake?
Yes
What actions can a driver perform if the Master Controller fails in the service brake zone? (4)
- MC handle to Emergency
- Park Brake switch to On
- MC Key to Off
- Press Emergency Stop Button
What 14 things open the Safety Loop?
- Cab Active (Cab Train/manned c/b)
- ESB active
- Master Controller to Emergency
- Emergency brake valves
- Emergency brake valves circuit breaker
- Safety Loop circuit breaker
- ## Trip activated
- dead man’s devices
- overspeed
- BCU major event relay
- MR relay
- ESB non-active cab
- Coupler Relay (auto-coupler c/b)
- VICERS
What MCBs would a driver check if headlights failed to operate? (2)
- External Lights Control MCB
- DC-DC Inverter, Front Light, Wiper MCB
What would a driver check if a whistle failed to sound?
- Windscreen Wiper/Washer, Horn MCB
- Whistle Isolating Cock
- DC-DC Inverter, Front Lights, Wiper MCB
When stabling a Siemens for fault finding, what will happen to the saloon doors, marker/saloon lights and PA?
Saloon doors closed and locked. Marker lights, external lights and saloon lights extinguished. PA system inoperative.
What equipment will be affected if both SIVs fail? (5)
- Air compressor fails
- Battery charger fails
- One fluro light in driver’s cab will fail
- Emergency lighting in saloon
- All HVACs will fail
If a driver receives an Another Cab Active fault, and the incorrect cab can’t be de-activated, what MCB would a driver trip in the incorrect cab?
Cab/Train Manned MCB
If there is an attempt to activate a second cab, what indications would a driver observe in the cab?
- Buzzer in the cab where the attempt is being made
- ‘Another Cab Active’ indicator will illuminate
What could cause a Critical Defect Indicator to illuminate? (3)
- Critical fault in the Pneumatic Friction System
- Complete loss of auxiliary power supply in one unit
- Defective wheel slip unit affecting safe operation of sanders
What is indicated with the General Fault indication light?
A maintenance requirement, or if a fault develops in a sub system on the train
How can a driver rectify a fault preventing the saloon doors from closing? (3)
- Operate the “button” button on the left side of the door
or - Trip the door supply MCB
- Close the doors manually
What happens if the air compressor is isoalted?
It will run continuously
How can a driver ascertain if a SIV has failed by looking at the affected car/DM car?
SIV fault light on affected car, and Maintenance Fault Light on the DM car
What indications does a driver get if a DER is activated? (3)
- DER indicator light
- PEI initiated
- FDCL
What indication would a driver receive if the Towing Cock was isoalted?
Flashing uncouple button
What happens to the rescuing train when the Towing Cock is isolated?
MR pressure to the coupler is reduced to 700 kPa
How does a driver attempt to clear a Reduced Performance light during a wheel slide event/traction lock event?
Move MC to ‘0’ for at least 2 seconds
Can SIVs be started manually by only raising a local pantograph manually?
No
Where is the Trailer Car fault panel?
No 2 end – to the right of Door 2
What lights would a driver use as their first steps to locate which car has a fault?”
The 1st Unit and 2nd Unit indication lamps
If a Critical Defect indicator is illuminated and it’s not possible to move the train, what must the driver inspect next? (2)
- Friction Brake and Monitoring MCBs in all cars of the affected unit
- Static Inverter Monitoring MCB in the trailer car
If low power is identified in the overhead traction system, what may a Siemens driver be instructed to do?
Trip at least one TCU MCB
Can a train remain in service if both the PA and DTRS PA are defective?
No
What should a driver do if one panto fails to raise after pressing the Panto Raise button?
Check Panto Motor MCB/ Panto Control MCB in the affected car. (If it’s only one panto, it’s likely Panto Motor)
If MCBs not tripped, attempt to raise from other cab
if pantos fail to lower when Stable button is pressed, which MCBs need to be checked? (2)
What can a driver do if neither MCBs will rectify the problem?
- Train Stable, HSCB & Light Control MCB in lead cab
- Shutdown Delay MCB
Driver’s next step is to trip/reset the TCU MCB
If a panto/s fails to lower with the Panto Down button, which MCB needs to be checked?
Panto Motor MCB in affected cars if not all pantos affected, check Panto Control MCB if all pantos affected.
(from EMU)
Which circuit breakers form part of the Door System? (4)
- Door Control Train Lined MCB
- Closed and Locked Loop MCB
- Door Control Power Supply (1 to 4) MCBs
- Door Control T Car MCB
Where is the Safety Loop Bypass Key Switch located?
MCB panel on the Bulkhead wall
What light illuminates on activation of the Safety Loop Bypass Key Switch?
Safety System Isolation Status light
If headlights fail to operate as normal, what MCBs should a driver check? (3)
- External Lights Control MCB
- DC-DC Inverter Front Light, Wiper MCB
- High Beams MCB
What fault light will a driver receive if the EP brake fails to release on one or more bogies?
Brake On status light
What should a driver do if the Park Brake cannot be released? (4)
- ID the affected bogie
- Close Bogie Isolating Cock
- Manually release brakes using the pull device
- Return bogie isolating cock to Open
What should a driver do if the Compressor Fault light illuminates on a 6-car train?
Continue as normal and monitor MR pressure
What piece of equipment reads and writes to and from brake pipe pressure during non-electrical coupling?
TU1
What’s holding brake pressure, and holding brake speed threashold on a Siemens?
Holding pressure: 110 kPa
Speed: 0.2km/h
How should a driver proceed if they receive a Critical Defect Indicator light? (3)
- Operate at low speed
- Detrain passengers at first available platform
- Shunt to nearest siding
How should a driver deal with a Maintenance Fault indicator light?
Book it and move on with your life
What is effect on a train if one SIV is defective?
Both HVACs will be at 50% capacity
Will activating a second cab open the safety loop?
Nope
What MCBs should be checked if the PIDS is inoperative? (2)
- DC-DC Inverter PA, PI display MCB (trip, wait 30 seconds, then reset)
- Passenger Information Display MCB
What MCBs/lights should be checked if the PA is inoperative? (3) What should they do if fault can’t be rectified?
- PA fault indicator light on fault panel
- DC-DC Inverter PA, PI display MCB
- PA system MCB
Driver should stable train if fault unable to be rectified (minimum 2 minutes)
What should a driver do in case of DTRS fault? What should they do if initial rectification attempts are unsuccessful?
Driver should reset DTRS using the DTRS MCB
(deactivate cab, trip MCB, wait 4 minutes before reactivating cab)
Enter TDN and perform radio test
If reset unsuccessful, driver should isolate DTRS using the MCB listed above, and use portable radio.
What should a driver do if no pantos raise when panto raise button is pressed? What’s the series of fault finding methods a driver would employ if initial attempt is unsuccessful?
- Inspect Panto Control MCB, reset if necessary
If unsuccessful: - Attempt to raise from another motor
If unsuccessful: - Stable. Trip Panto Motor MCB and manually raise lead panto w/ crank, press Panto Up and reset Panto Motor MCB.
What fault/status lights can indicate loss of ED brake? (2)
- Yellow Electric Brake Inhibit button
- Brakes On train status button
What fault lights do we receive if EP brakes fail to release on one or more bogie? (3)
- Brakes On (yellow Train Status)
- Brakes Bogie 1 and/or 2 (red Local Fault)
- 1st or 2nd Unit (red fault location)
What should a driver do if the park brake has failed to release on a bogie? (3)
- Attempt to release via the rotary switch several times
- Observe Cab/Train Manned MCB is set
- Attempt to power train against park brake
How does a driver manually release a park brake? (3)
- Isolate bogie in brake module
- Unlock/remove pin and manually release park brake
- Return bogie isolation cock to original position
Why does a driver need to isolate the bogie before releasing the park brake?
I don’t care
What is the likely cause of Main Res pressure consistently reading aprox 700 kPa?
Towing cock is open
How does a driver isolate a main res pipe leak on a centre motor?
What speed restrictions apply?
- Close main res end cocks
- manually release park brakes
- isolate safety loop
Speed is in accordance with bogie isolated protocol, unless air bags are deflated in which case max 80km/h
