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 154) and 95.13 Reduced run mode…95.14
Connected modules (page 511).
Events: 5695 Reduced run (page 559).
Program features 125
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