Periodic Inspections; Control Unit Inspections - Mitsubishi Electric MDS-B-SPJ2 Series Specification Manual

10.2 Periodic inspections

10.2.1 Control unit inspections

Do not carry out a megger test (insulation resistance measurement) on the drive unit control circuit.
Inspection Inspection
item
Once a
1 Cooling fan
month
Dirt and
When
2 screw
needed
loosening
When
3 Wiring
needed
10. Daily Maintenance
cycle
(1) Does the fan turn smoothly when rotated by
hand?
(2) Is the fan sufficiently powerful when turned
ON?
(3) Is there any abnormal noise from the
bearings?
Periodically clean the outside of the amplifier,
especially the cooling fan. Also, periodically
tighten the input/output terminals and all
connections.
The wires must not contact any conductive parts
or be pinched.
NOTE
Essential points
10 − 2
Remedy
Replace the unit