Yaskawa Matrix Converter User Manual Page 7

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Maintenance and Inspection
CAUTION
Do not touch the cooling fins (heatsink), braking resistor, or Braking Resistor Unit. These compo-
nents can become extremely hot.
These components become hot enough to cause serious burns.
Be sure that the motor and machine is within the applicable ranges before starting operation.
Failure to do so may result in injury.
Provide a separate holding brake if necessary.
The external sequence should be designed to ensure that the holding brake is activated in the
event of an emergency, power failure, or fault in the MxC.
Failure to do so may result in injury.
If using an MxC with an elevator, take proper steps to ensure safety and to prevent the elevator
from falling suddenly.
Failure to observe to do so may result in injury.
Refrain from checking relay signals while the MxC is running.
Failure to do so may result in damage to the application.
Be careful when changing any settings in the MxC. The default settings when the MxC is first
shipped are generally set to optimal values.
Failure to do so may result in damage to the application.
WARNING
Do not touch the MxC terminals. Some of the terminals carry high voltages and are extremely dan-
gerous.
Failure to do so may result in electric shock.
Always have the protective cover in place when power is being supplied to the MxC. When attach-
ing the cover, always turn off power to the MxC through the MCCB.
Failure to do so may result in electric shock.
After turning the main circuit power supply off, wait until the CHARGE display light goes out before
performing maintenance or inspections.
The capacitor will remain charged and is dangerous.
Maintenance, inspection, and replacement of parts must be performed authorized personnel only.
Remove all metal objects, such as watches and rings, before starting work. Always use grounded tools.
Failure to heed these warning may result in electric shock.
Customers must provide the holding brakes.
Before making any adjustments other than those done in actual operations, be sure to tighten the holding brakes by using
an external sequence.
Failure to do so may result in electric shock.
If the MxC is used with an elevator, be sure to take safety measures to prevent the car from falling.
Failure to do so may result in electric shock.
CAUTION
A CMOS IC is used in the control board. Handle the control board and CMOS IC carefully.
The CMOS IC may be destroyed by static electricity if touched directly.
The control boards designed for MxCs for a motor capacity of 75 kW or less cannot be used for
MxCs for a motor capacity of 110/160 kW.
The control boards are not compatible among all models of MxC. Refer to the model numbers of the applicable control
boards below.
Control board for MxCs with a motor capacity of 110/160 kW: ETC74140X, ETC74141X
Control board for MxCs with a motor capacity of 75 kW or less: ETC73014X, ETC74015X
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