Keeping Out Foreign Materials; Inspection Items; Periodic Inspection - Mitsubishi Electric -MR-CV User Manual

2.2

Keeping out foreign materials

When drilling the cabinet for assembly, prevent drill chips and wire fragments from entering the converter unit.
Prevent foreign matter such as oil, water, and metallic dust from entering the converter unit through cooling fans installed in
openings in the cabinet or on the ceiling.
When installing the cabinet in a place where toxic gas, dirt, and dust exist, conduct an air purge (force clean air into the
cabinet from outside to make the internal pressure higher than the external pressure) to prevent such materials from entering
the cabinet.
2.3

Inspection items

Precautions
• Do not disassemble, repair, or modify the product.
• For repair and parts replacement, contact your local sales office.
• To prevent a malfunction, do not perform an insulation resistance test (megger test) on the converter unit.

Periodic inspection

Perform the following inspections.
• Check for loose terminal block screws. Retighten any loose screws.
• Check the cables and the like for scratches or cracks. Inspect them periodically according to operating conditions
especially when the servo motor is movable.
• Check that the connector is securely connected to the converter unit.
• Check that the wires are not coming out from the connector.
• Check for dust accumulation on the converter unit.
• Check for unusual noise generated from the converter unit.
• Make sure that the emergency stop circuit operates properly such that an operation can be stopped immediately and a
power is shut off by the emergency stop switch.
2 INSTALLATION
2.2 Keeping out foreign materials
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