8.2 Bimonthly to Semiannual Inspection Items
8-2
HW0480311
HW0480311
8.2
Bimonthly to Semiannual Inspection Items
Perform the following:
(1) Removal of dust and dirt
Remove dust and dirt by spraying dry compressed air. Carefully clean spaces
between the transformer and reactor windings, and semiconductors.
To clean circuit boards, use the exclusive-use dust remover device.
(2) Inspection of electric connecting sections
Check that the bolts are firmly tightened and rust or the like does not deteriorate the
contacts in the connecting sections with the external wiring such as input/output ter-
minals or with the internal wiring. Retighten the bolts if necessary or use a file to
remove rust, if any, so that the metallic faces contact with each other.
(3) Inspection of ground line
Confirm that the case is grounded properly.
8.3
Annual Overhaul and Repair
Carry out the integrated repair such as replacement of defective components, case repair,
and reinforcement of insulation deteriorated parts. Insulation resistance must be 1M
Ω
or
more between the control unit circuit and the case; if it is less than 1M
Ω
, the insulation of the
deteriorated part must be repaired.
70/129
