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Troubleshooting
Troubleshooting
and Maintenance
6–2
Troubleshooting
Safety Messages Please read the following safety messages before troubleshooting or performing maintenance
on the inverter and motor system.
WARNING: Wait at least five (5) minutes after turning OFF the input power supply before
performing maintenance or an inspection. Otherwise, there is the danger of electric shock.
WARNING: Make sure that only qualified personnel will perform maintenance, inspection,
and part replacement. Before starting to work, remove any metallic objects from your person
(wristwatch, bracelet, etc.). Be sure to use tools with insulated handles. Otherwise, there is a
danger of electric shock and/or injury to personnel.
WARNING: Never remove connectors by pulling on its wire leads (wires for cooling fan and
logic P.C. board). Otherwise, there is danger of fire due to wire breakage and/or injury to
personnel.
General Precau-
tions and Notes
• Always keep the unit clean so that dust or other foreign matter does not enter the inverter.
• Take special care to avoid breaking wires or making connection mistakes.
• Firmly connect terminals and connectors.
• Keep electronic equipment away from moisture and oil. Dust, steel filings and other foreign
matter can damage the inverter, causing unexpected accidents, so take special care.
Inspection Items This chapter provides instructions or checklists for these inspection items:
• Daily inspection
• Periodic inspection (approximately once a year)
• Insulation resistance test