MV510 series high-voltage inverter maintenance manual
17
·
Power cell input and output terminals, fiber optic cable connectors
·
Power cell screws, bolts and connectors
·
Control power input terminal
·
Control transformer input terminal and output terminal (optional)
·
Power relay input and output terminal for cooling fan
·
Various control circuit board screws, bolts and connectors
·
Control input terminal, output terminal
■
Transformer
Check the following items:
•
Check for anything abnormal in the external appearance.
•
Check for discoloration indicating burn marks.
•
Check for accumulated dirt and dust then remove.
If you find any, clean it away.
•
Check for loose bolts in the I/O terminals and tap terminals. Retighten bolts to
the recommended tightening torque.
■
Power cell
Check the following items:
•
Check for discoloration indicating burn marks.
•
Check for leakage from the smoothing capacitor.
•
Check for loose bolts in the input terminals (R, S, T) and the output terminals
(T1, T2). Retighten bolts to the recommended tightening torque.
•
Check for a loose fiber optic cable connector and re-insert.
•
Check for loose screws and bolts inside Power Cells. Retighten screws and bolts
to the recommended tightening torque.
If there are any, retighten them.
•
Check the main circuit fuse and control fuse on the board for discoloration and
partial looseness.
•
Check for accumulation of dirt and dust on the heatsink.
Remove debris with dried compressed air at: 39.2
×
104 to 58.8
×
104 Pa (4 to
6 kg�cm2).
■
Door filter
When the door filter is dirty or clogged, the cooling capacity of the medium-
voltage inverter will be reduced, causing abnormal temperature. Please check the
degree of dirt during daily inspections and decide how often to clean the filter
according to the degree of soiling (make sure the filter is dry when installing the
filter)
■
Board
Check the following items:
•
Check the board for abnormal odors or discoloration.
