ABB ACS880-207, Hardware Manual

Page: 89 / 148

Starting reduced run operation
WARNING!
Obey the safety instructions given in ACS880 multidrive cabinets and
modules safety instructions (3AUA0000102301 [English]). If you ignore
the safety instructions, injury or death, or damage to the equipment can
occur.
If you are not a qualified electrical professional, do not do installation or
maintenance work.
WARNING!
Use the required personal protective equipment. Wear protective gloves and long
sleeves. Some parts have sharp edges.
1. Stop the drive and do the steps in section Electrical safety precautions (page 46) before
you start the work.
2. If the control unit is powered from the faulty module, connect the control unit to another
24 V DC power supply. ABB strongly recommends using an external power supply with
supply/rectifier units consisting of parallel-connected modules.
3. Remove the module to be serviced from its bay.
4. Install an air baffle (for example, plexiglass) to the top module guide to block the airflow
through the empty module bay.
5. Switch on the power to the supply/rectifier unit.
6. Enter the number of supply/rectifier modules present into parameter 195.13 Reduced
run mode .
7. Reset all faults and start the supply/rectifier unit. The maximum current limit is now
automatically set according to the new configuration. A mismatch between the number
of detected modules (parameter
195.14 ) and the value set in 195.13 will generate a
fault.
Resuming normal operation
WARNING!
Obey the safety instructions given in ACS880 multidrive cabinets and
modules safety instructions (3AUA0000102301 [English]). If you ignore
the safety instructions, injury or death, or damage to the equipment can
occur.
If you are not a qualified electrical professional, do not do installation or
maintenance work.
1. Stop the drive and do the steps in section Electrical safety precautions (page 46) before
you start the work.
2. Remove the air baffle from the module bay.
3. Reinstall the module into its bay.
4. Switch on the power to the supply/rectifier unit.
5. Enter "0" into parameter 195.13 Reduced run mode .
Maintenance 89