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INSPECTIONS AND MAINTENANCE
Maintenance and inspection is a particularly effective means to help prevent failures and reduce
down time. Creating equipment specific inspection and maintenance check sheets can help in performing
maintenance and inspection effectively. Detailed inspections and regular maintenance should be carried
out, in short cycles initially, until a schedule, reflecting the site-specific conditions, can be determined.
For items that are too high to reach, use a step ladder to gain access. Do not attempt to climb on
the equipment.
Daily Inspections
Daily inspections consist mainly of visual inspections on the following items. These observations
should be made with all cubicle doors closed and safety covers installed. Any abnormalities discovered
should immediately be repaired.
1) Check the temperature, the humidity, the presence of corrosive or explosive gases, and the
presence of dust in the area.
2) Check for any abnormal sound or vibration originating from the reactor, transformer, or cooling
fans.
3) Check for abnormal odors such as the smell of burning insulating materials.
Regular Inspections
Carry out regular inspections with the power off, locked out, and with confirmation that the bus
voltage is completely discharged. Use proper power lockout/tagout procedure on the disconnecting
means in accordance with applicable local electrical codes (in the U.S., see 2002 NEC Article 430-101)
before performing any drive maintenance.
The first thing to do in maintenance and inspection is cleaning. Cleaning should be carried out
according to the conditions of the equipment. Before starting cleaning, turn off the power supply and check
that the main circuit voltage is reduced to 0. Clean dust with a vacuum, dry compressed air, and clean dry
cloths. Note that excessive air pressure when blowing out equipment may damage parts and wiring. Do
not use solvents to clean the drive. Substances stuck to the circuits, which cannot be removed by
blowing, should be wiped away using a cloth. As a basic rule, cleaning should start from the upper parts
and end at the lower parts. Cleaning of the lower parts last will allow proper removal of substances that
could drop from the upper parts.
IF08CZ10 April, 2019
CAUTION
DANGER
CAUTION
DANGER
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