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GSM-R user procedures (cab radio Version 2)

9 Trouble-shooting guide

This section describes the action that you can take to identify and overcome possible

problems associated with the GSM-R cab radio.

9.1 Losing the main power supply (back-up battery arrangements)

If the main power supply to the traction unit is interrupted, for any

reason, the cab radio can continue to operate from the vehicle

batteries.

Once the vehicle batteries have run out, or if the batteries have

been isolated, continued operation of the cab radio depends on

whether the radio has a GSM-R back-up battery installed.

If a GSM-R back-up battery has been fitted, power will

automatically be provided for up to two hours. If the cab radio

was powered down and needs to be switched on without a

vehicle battery supply, you will need to operate the GSM-R

battery back-up switch and power up the cab radio as described

in section 6.1.2.

If the cab radio drivers control panel was powered on, then the cab radio will automatically

switch to the back-up battery.

GSM-R GB

1A26

Batt

 The ‘Batt’ indicator flashing tells you that you have approximately 10 minutes of

remaining.

If the back-up battery has become fully discharged through use, the next time the radio is

switched on (assuming the batteries are still discharged) a ‘Battery low’ indication will be

seen on the display.

This message will continue to be displayed until the

battery has charged to a serviceable level, and the

driver’s key has been removed and re-inserted or the

test button is pressed, for example, if the battery has

charged up enough during a journey, when the key is

re-inserted or the test button is pressed, a battery presence test will occur and clear the

previous warning if sufficient voltage is detected.

 When the ‘Battery low’ indication is shown the cab radio is fully functional but the

presence of the indication should be reported if it does not clear before the end of the

journey.

When the radio is operating on the back-up battery

then this will be shown on the cab radio display by the

‘Batt’ indication. If the back-up battery is running low,

you will hear a single alert tone and the ‘Batt’ indication

will flash.

GSM-R GB

Battery low

Back-up switch

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