Maintenance And Inspection; Inspection - Mitsubishi Electric MELIPM Series Instruction Manual

6.3 Maintenance and Inspection

When performing inspection by removing the front cover or the like,
switch power off, wait 10 or more minutes, then check that the voltage
across the DC terminals P/+-N/- is less than 30VDC with a tester or like
before starting inspection. Not doing so can cause an electric shock.
Any person who is involved in inspection should be fully competent to
do the work. Otherwise, an electric shock can occur. Do not
disassemble or repair the unit.

6.3.1 Inspection

(1) Daily inspection
During operation and power-on, visually check for the following faults without
removing the cover and like.
1) Faulty motor operation
2) Improper installation environment (ambient temperature, humidity, dust, dirt,
etc.)
3) Unusual noise, unusual vibration, foul odor, etc.
4) Overheat trace, discoloration, etc.
5) Improper cooling fan rotation
6) Improper on/off of lamps, LEDs and others
7) Improper meter indications
Always use the drive unit in a clean status.
• When cleaning, always switch power off and gently wipe dirty
areas with a soft cloth immersed in neutral detergent or ethanol.
Do not use detergent or the like to clean the display section of the
NOTICE
parameter unit.
• When cleaning, do not use solvent, e.g. acetone, benzene, toluene
or alcohol, as they will cause the drive unit surface paint to peel
off.
(2) Periodic inspection
After operation has stopped, switch power off, remove the front cover, and
perform periodic inspection referring to Table 6-5 Periodic Inspection List.
WARNING
6-7
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6. TROUBLESHOOTING
6