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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.