Starting Reduced Run Operation; Resuming Normal Operation - ABB ACS880-104 Hardware Manual

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Starting reduced run operation

WARNING!
Read the safety instructions given in Safety instructions for ACS880
multidrive cabinets and modules (3AUA0000102301 [English]). If you
ignore them, injury or death, or damage to the equipment can occur.
1. Stop the drive and do the steps in section
you start the work.
2. If the inverter control unit is powered from the faulty module, connect the control unit to
another 24 V DC power supply. We strongly recommend using an external power supply
with inverter units consisting of parallel-connected modules.
3. Remove the module to be serviced from its bay.
4. If the STO (Safe torque off) function is in use, install the STO jumper wire set 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 charging monitoring unit.
7. Switch on the power to the inverter unit.
8. Enter the number of inverter modules present into parameter 95.13 Reduced run mode.
9. Reset all faults and start the 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.
10. If the STO function is in use, validate it as described in chapter
function (page 313).
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Resuming normal operation

WARNING!
Read the safety instructions given in Safety instructions for ACS880
multidrive cabinets and modules (3AUA0000102301 [English]). If you
ignore them, injury or death, or damage to the equipment can occur.
1. Stop the drive and do the steps in section
you start the work.
2. Remove the STO (Safe torque off) jumper wire set (if present).
3. Remove the air baffle from the module bay.
4. Reinstall the module into its bay.
5. Reconnect the STO wiring (if used) to the module.
6. In case the inverter unit has a DC switch with a charging circuit, re-enable all channels
on the charging monitoring unit.
7. Switch on the power to the inverter unit.
8. Enter "0" into parameter 95.13 Reduced run mode.
9. If the STO function is in use, validate it as described in chapter
function (page 313).
Electrical safety precautions (page 144)
Electrical safety precautions (page 144)
Maintenance 199
before
The Safe torque off
before
The Safe torque off