N700E INSTRUCTION MANUAL
8-1
8. Maintenance and Inspection
Please read following safety messages before troubleshooting or performing maintenance on the
inverter and motor system.
8.1
General Precautions and Notes
•Always keep the unit clean so that dust of other foreign matter does not enter the inverter.
•Take special care in regard to breaking wires of 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 insulation, causing unexpected accidents, so take special care.
•When removing connectors, never pull the wires(wires for the cooling fan and logic P.C. board.)
Otherwise, there is danger of fire due to wire breakage and/or injury to personnel.
8.2
Inspection Items
(1)Daily inspection
(2) Periodic inspection(approximately once a year)
(3)Insulation resistance test(approximately once two years)
Conduct the insulation resistance test by short circuiting the terminals as shown below.
• Never test the withstand voltage on the inverter.
The inverter has a surge protector between the main circuit terminals and the chassis ground.
DANGER
•Wait at least five(5) minutes after turning off the input power supply before performing
maintenance of an inspection.
Otherwise, there is the danger ofelectric shock.
•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.
