Routine Maintenance and Inspection
‑150‑
Item
Description
Solution Checked
Coolant
(for T13 models only)
Check coolant for deterioration
(yellowing), discoloration, and
impurities.
Replace the coolant.
Dust filter foam
(for T13 models only)
Check the dust filter foam for dust that
affects heat dissipation.
Clean the dust filter foam.
8.2 Main Circuit Insulation Test
Do not conduct high voltage (> 500 V) tests, which are already done before delivery.
Before testing, remove the VDR screw and disconnect the VDR.
Before measuring insulation resistance with a megameter (500 VDC megameter
recommended), disconnect the main circuit from the AC drive first. Do not measure
the control circuit insulation resistance with an insulation resistance meter.
The insulation resistance measured must be greater than 5 MΩ.
Disconnect the optional grounding screw of VDR before any voltage resistance test; failure
to comply may result in test failure.
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