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6. Maintenance, Inspection and Part (Cooling Fan) Replacement
WARNING
Any person who is involved in maintenance, inspection or part replacement should be fully
competent to do the work. Otherwise, an electric shock or injury can occur.
Before starting maintenance, inspection or part replacement, make sure that the motor is
at a stop, wait for more than 10 minutes after switching power off, and confirm that the DC
voltage across the DC terminals P/+ and N/- is low enough to do the work. Immediately
after power-off, the DC terminals P/+, N/- are charged with more than 200V (residual
voltage of the internal capacitor). Therefore, an electric shock may occur.
Even after power-off, the motor connection terminals U, V, W have high voltages while the
motor is running. Always start the work after confirming that the motor has stopped. Not
doing so can cause an electric shock.
Do not conduct a pressure test. A pressure test can damage the drive unit.
Do not perform an insulation resistance test on the control circuit using a megger. Such a
test can damage the drive unit.
While power is on, do not replace the cooling fan. Replacing the cooling fan during power-
on can be hazardous.
7. Disposal
CAUTION
Dispose of the drive unit as general industrial waste. Its solder (lead) can cause
environmental contamination.