Activation of the reduced run function
Note: For cabinet-built drives, the wiring accessories and the air baffle needed during
the procedure are available from ABB, and are included in the delivery.
WARNING!
Follow the safety instructions provided for the drive or inverter unit in
question.
1. Disconnect the supply voltage and all auxiliary voltages from the drive/inverter unit.
2. If the inverter control unit is powered from the faulty module, install an extension to
the wiring and connect it to one of the remaining modules.
3. Remove the module to be serviced from its bay. See the appropriate hardware
manual for instructions.
4. If the Safe torque off (STO) function is in use, install jumpering in the STO wiring
in place of the missing module (unless the module was the last on the chain).
5. Install an air baffle to the top module guide to block the airflow through the empty
module bay.
6. In case the inverter unit has a DC switch with a charging circuit, disable the
appropriate channel on the xSFC-xx charging controller.
7. Switch on the power to the drive/inverter unit.
8.
Enter the number of inverter modules present into parameter 95.13.
9. Reset all faults and start the drive/inverter unit. The maximum current is now
automatically limited according to the new inverter configuration. A mismatch between
the number of detected modules (95.14) and the value set in 95.13 will generate a
fault.
After all modules have been reinstalled, parameter 95.13 must be reset to 0 to disable
the reduced run function. In case the inverter is equipped with a charging circuit, the
charging monitoring must be reactivated for all modules. If the Safe torque off (STO)
function is in use, an acceptance test must be performed (see the hardware manual of
the drive/inverter unit for instructions).
Settings and diagnostics
Parameters: 6.17 Drive status word 2 (page 156) and 95.13 Reduced run mode…95.14
Connected modules (page 502).
Events: 5695 Reduced run (page 549).
106 Program features
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