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Metro Traineeship > Siemens Fault Finding > Flashcards

Siemens Fault Finding Flashcards

1
Q

What is the maximum permissible speed with deflated airbags in a Siemens train?

A

80km/h

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2
Q

At what MR pressure do the park brakes come on automatically?

A

350 kPa

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3
Q

In which car is the PA system MCB located?

A

DMA car

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4
Q

SIVs will not be able to start up if battery voltage falls below what kPa?

A

82v DC

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5
Q

At what MR pressure will the Compressor Fault light illuminate?

A

Below 850 kPa

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6
Q

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?

A

True

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7
Q

If a Siemens train fails to stable, which MCBs need to be checked? (3)

A
  • Shutdown delay MCB
  • Train stable/HSCB & light control MCB
  • Cab Train Manned MCB
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8
Q

Where is the whistle isolating cock located?

A

Left side of driver’s foot panel

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9
Q

What brakes must be used on a Comeng train whilst rescuing a Siemens train?

A

Auto air brake

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10
Q

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?

A

Declare train disabled

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11
Q

Which MCB should be checked if multiple pantos fail to raise?

A

Panto Control MCB

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12
Q

Which MCBs will render the train disabled from the affected cab, if unable to reset? (3)

A
  • Cab Train Manned MCB
  • Safety Loop MCB
  • Emergency Brake Valves
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13
Q

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)

A
  • Trip raised
  • Trip MCB tripped
  • Trip Cock ByPass Keyswitch turned
  • VICERS bypassed
  • Powering from this cab
  • MAD button introduced
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14
Q

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?

A

Place Master Controller to Coast

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15
Q

Which MCBs should a driver check if CCTV is inoperative? (2)

A
  • DC-DC Inverter, PA, PI display MCB (reset for fault rectification)
  • CCTV Central Control MCB
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16
Q

How would you turn off an HVAC if there is a fire on board the train?

A

HVAC rotary switch on Fault and Status panel

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17
Q

What equipment will be affected if you lose MR on a motor car? (4)

A
  • Friction brake
  • Whistle
  • Air Bags
  • Park Brakes
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18
Q

What indication do you get if TCU is not functioning?

A

Reduced Performance Fault Light

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19
Q

What steps are required to isolate a defective pantograph? (4)

A
  • Stable train
  • Trip Panto Motor MCB
  • Lower panto w/ handle if required
  • Insert key and raise pantos
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20
Q

Which MCB controls the panto in that local car?

A

Panto Motor MCB

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21
Q

Below what MR pressure does the safety loop open?

A

600 kPa

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22
Q

Does EP brake come on automatically during loss of ED brake?

A

Yes

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23
Q

What actions can a driver perform if the Master Controller fails in the service brake zone? (4)

A
  • MC handle to Emergency
  • Park Brake switch to On
  • MC Key to Off
  • Press Emergency Stop Button
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24
Q

What 14 things open the Safety Loop?

A
  • 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
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25
Q

What MCBs would a driver check if headlights failed to operate? (2)

A
  • External Lights Control MCB
  • DC-DC Inverter, Front Light, Wiper MCB
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26
Q

What would a driver check if a whistle failed to sound?

A
  • Windscreen Wiper/Washer, Horn MCB
  • Whistle Isolating Cock
  • DC-DC Inverter, Front Lights, Wiper MCB
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27
Q

When stabling a Siemens for fault finding, what will happen to the saloon doors, marker/saloon lights and PA?

A

Saloon doors closed and locked. Marker lights, external lights and saloon lights extinguished. PA system inoperative.

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28
Q

What equipment will be affected if both SIVs fail? (5)

A
  • Air compressor fails
  • Battery charger fails
  • One fluro light in driver’s cab will fail
  • Emergency lighting in saloon
  • All HVACs will fail
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29
Q

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?

A

Cab/Train Manned MCB

30
Q

If there is an attempt to activate a second cab, what indications would a driver observe in the cab?

A
  • Buzzer in the cab where the attempt is being made
  • ‘Another Cab Active’ indicator will illuminate
31
Q

What could cause a Critical Defect Indicator to illuminate? (3)

A
  • 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
32
Q

What is indicated with the General Fault indication light?

A

A maintenance requirement, or if a fault develops in a sub system on the train

33
Q

How can a driver rectify a fault preventing the saloon doors from closing? (3)

A
  • Operate the “button” button on the left side of the door
  • Trip the door supply MCB
  • Close the doors manually
34
Q

What happens if the air compressor is isoalted?

A

It will run continuously

35
Q

How can a driver ascertain if a SIV has failed by looking at the affected car/DM car?

A

SIV fault light on affected car, and Maintenance Fault Light on the DM car

36
Q

What indications does a driver get if a DER is activated? (3)

A
  • DER indicator light
  • PEI initiated
  • FDCL
37
Q

What indication would a driver receive if the Towing Cock was isoalted?

A

Flashing uncouple button

38
Q

What happens to the rescuing train when the Towing Cock is isolated?

A

MR pressure to the coupler is reduced to 700 kPa

39
Q

How does a driver attempt to clear a Reduced Performance light during a wheel slide event/traction lock event?

A

Move MC to ‘0’ for at least 2 seconds

40
Q

Can SIVs be started manually by only raising a local pantograph manually?

A

No

41
Q

Where is the Trailer Car fault panel?

A

No 2 end – to the right of Door 2

42
Q

What lights would a driver use as their first steps to locate which car has a fault?”

A

The 1st Unit and 2nd Unit indication lamps

43
Q

If a Critical Defect indicator is illuminated and it’s not possible to move the train, what must the driver inspect next? (2)

A
  • Friction Brake and Monitoring MCBs in all cars of the affected unit
  • Static Inverter Monitoring MCB in the trailer car
44
Q

If low power is identified in the overhead traction system, what may a Siemens driver be instructed to do?

A

Trip at least one TCU MCB

45
Q

Can a train remain in service if both the PA and DTRS PA are defective?

A

No

46
Q

What should a driver do if one panto fails to raise after pressing the Panto Raise button?

A

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

47
Q

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?

A
  • Train Stable, HSCB & Light Control MCB in lead cab
  • Shutdown Delay MCB

Driver’s next step is to trip/reset the TCU MCB

48
Q

If a panto/s fails to lower with the Panto Down button, which MCB needs to be checked?

A

Panto Motor MCB in affected cars if not all pantos affected, check Panto Control MCB if all pantos affected.

49
Q

(from EMU)
Which circuit breakers form part of the Door System? (4)

A
  • Door Control Train Lined MCB
  • Closed and Locked Loop MCB
  • Door Control Power Supply (1 to 4) MCBs
  • Door Control T Car MCB
50
Q

Where is the Safety Loop Bypass Key Switch located?

A

MCB panel on the Bulkhead wall

51
Q

What light illuminates on activation of the Safety Loop Bypass Key Switch?

A

Safety System Isolation Status light

52
Q

If headlights fail to operate as normal, what MCBs should a driver check?

A
  • External Lights Control MCB
  • DC-DC Inverter Front Light, Wiper MCB
  • High Beams MCB
53
Q

What fault light will a driver receive if the EP brake fails to release on one or more bogies?

A

Brake On status light

54
Q

What should a driver do if the Park Brake cannot be released? (4)

A
  • ID the affected bogie
  • Close Bogie Isolating Cock
  • Manually release brakes using the pull device
  • Return bogie isolating cock to Open
55
Q

What should a driver do if the Compressor Fault light illuminates on a 6-car train?

A

Continue as normal and monitor MR pressure

56
Q

What piece of equipment reads and writes to and from brake pipe pressure during non-electrical coupling?

A

TU1

57
Q

What’s holding brake pressure, and holding brake speed threashold on a Siemens?

A

Holding pressure: 120 kPa
Speed: 0.2km/h

58
Q

How should a driver proceed if they receive a Critical Defect Indicator light? (3)

A
  • Operate at low speed
  • Detrain passengers at first available platform
  • Shunt to nearest siding
59
Q

How should a driver deal with a Maintenance Fault indicator light?

A

Book it and move on with your life

60
Q

What is effect on a train if one SIV is defective?

A

Both HVACs will be at 50% capacity

61
Q

Will activating a second cab open the safety loop?

A

Nope

62
Q

What MCBs should be checked if the PIDS is inoperative? (2)

A
  • DC-DC Inverter PA, PI display MCB (trip, wait 30 seconds, then reset)
  • Passenger Information Display MCB
63
Q

What MCBs/lights should be checked if the PA is inoperative? (3) What should they do if fault can’t be rectified?

A
  • 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)

64
Q

What should a driver do in case of DTRS fault? What should they do if initial rectification attempts are unsuccessful?

A

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.

65
Q

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?

A
  • 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.
66
Q

What fault/status lights can indicate loss of ED brake? (2)

A
  • Yellow Electric Brake Inhibit button
  • Brakes On train status button
67
Q

What fault lights do we receive if EP brakes fail to release on one or more bogie? (3)

A
  • Brakes On (yellow Train Status)
  • Brakes Bogie 1 and/or 2 (red Local Fault)
  • 1st or 2nd Unit (red fault location)
68
Q

What should a driver do if the park brake has failed to release on a bogie? (3)

A
  • Attempt to release via the rotary switch several times
  • Observe Cab/Train Manned MCB is set
  • Attempt to power train against park brake
69
Q

How does a driver manually release a park brake? (3)

A
  • Isolate bogie in brake module
  • Unlock/remove pin and manually release park brake
  • Return bogie isolation cock to original position
70
Q

Why does a driver need to isolate the bogie before releasing the park brake?

A

I don’t care

71
Q

What is the likely cause of Main Res pressure consistently reading aprox 700 kPa?

A

Towing cock is open

72
Q

How does a driver isolate a main res pipe leak on a centre motor?

What speed restrictions apply?

A
  • 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

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