Removing the AVT combination module
1. Follow "the five safety rules (Page 11)".
2. Release the control cables
①
. Carefully ensure that you do not kink the fiber optic cables.
3. Remove the four fixing screws
②
of the AVT combination module.
Figure 9-3
Example of an AVT combination module
Installing the AVT combination module
1. Use the screws
②
to secure the AVT combination module.
2. Reconnect the control lines
①
. Do not bend the fiber-optic conductors.
9.6.2
Replacing the snubber circuit capacitor
WARNING
Electric shock hazard
The snubber circuit capacitors are not equipped with discharge resistors. The energy stored in
the capacitors is discharged via a circuit in the thyristor electronics. This circuit is interrupted
when the thyristor electronics are withdrawn.
Voltages of up to several 1000 V can occur and cause an electric shock. This can result in death,
severe injuries and significant material damage.
• In this case you should always handle the capacitors as if they were charged.
• Discharge the snubber circuit capacitors. Short-circuit the snubber circuit capacitors before
you withdraw the thyristor electronics.
Maintenance
9.6 Repairs
3rd Party LCI Control Upgrade
Operating Instructions, 02/2022, A5E31872818
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