6.2 Periodic Inspection
YASKAWA ELECTRIC EZZ010928 FSDrive-MV1000 Instructions 163
Periodic Inspection &
Maintenance
6
◆ Periodic Inspection
Table 6.2 outlines the recommended periodic inspections for Yaskawa drives. Although periodic inspections should
generally be performed once a year or every two years, the drive may require more frequent inspection in harsh
environments or with rigorous use. Periodic inspection will help to avoid premature deterioration in performance or
product failure. Copy this checklist and mark the “Checked” column after each inspection.
■
Periodic Inspection
DANGER! Electrical Shock Hazard. Do not perform inspection while the power for the main circuit and controls is on. Failure to
comply could result in death or serious injury. Before starting inspection, disconnect the power supply to all the
equipment. Internal capacitors retain some charge even after the main circuit power supply is turned off. Wait at least 15
minutes after turning the power off.
Table 6.2 Periodic Inspection Checklist
Location Inspection Category Details of Inspection Page Checked
Transformer Panel
Power Cell Panel
Entire transformer and
Power Cell panel
Megger check between the main circuit terminals and ground
terminal
164
Check for loose screws, bolts, or connectors. 164
Check for damage to, or deformation or discoloration of parts
due to overheating or deterioration.
–
Check for soiling or adhesion of dust, etc. –
Wires Check for damage or deterioration of the cable sheath. –
Transformer
Check the windings for damage, and check for breakage in the
insulation sheets.
164
Check the windings for accumulation of dust, and for
adhesion of foreign matter.
Power Cells
Check for leakage from the smoothing capacitor.
165
Confirm that the safety valve of the smoothing capacitor is not
protruding.
Confirm that the smoothing capacitor has not expanded.
Measure the capacitance of the smoothing capacitor.
(Check the indication on the gage.)
Check for loose screws or bolts.
Check that the main circuit fuse and the control fuses on the
boards are normal.
Check for accumulated dust and dirt on the heat sink.
Surge absorber
Make sure the appearance is clean, the terminals are tight, and
the installation bolts are securely fastened.
–
Control Panel
Circuits Confirm no abnormalities in protective and indication circuits. –
Relays
Confirm that there is no chattering noise during operation.
–Confirm timer operation.
Check for damaged contacts.
Board
Check for abnormal smells and discoloration.
165Confirm the power supply voltage.
Check for loose screws or bolts.
Digital Operator
Make sure data appears on the digital operator properly. –
Check for soiling of the digital operator. –
Cooling System
Air filter Check for dirty or clogged filter. 165
Cooling fan
Check for abnormal vibration and noise.
165
Confirm the bearing operation.
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