Maintenance and hardware diagnostics 371
7. Install the new fan holder including the fan in reverse order.
8. Restore power.
Capacitors
Reforming the capacitors
The capacitors must be reformed if the drive has been stored for a year. See section
Type designation label on page 30 for how to find out the manufacturing time from the
serial number. For information on reforming the capacitors, refer to Guide for
capacitor reforming in ACS50, ACS55, ACS150, ACS310, ACS350, ACS355,
ACS550 and ACH550 (3AFE68735190 [English]), available on the Internet (go to
http://www.abb.com
and enter the code in the Search field).
Power connections
WARNING! Read and follow the instructions in chapter Safety on page
17. Ignoring the instructions can cause physical injury or death, or
damage to the equipment.
1. Stop the drive and disconnect it from the power line. Wait for five minutes to let the
drive DC capacitors discharge. Ensure by measuring with a multimeter
(impedance at least 1 Mohm) that there is no voltage present.
2. Check the tightness of the power cable connections. Use the tightening torques
given in section Terminal and lead-through data for the power cables on page
384.
3. Restore power.
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