
13.1 Maintenance and Inspection
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3
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13.1 Maintenance and Inspection
This section explains the maintenance and inspection methods for the Inverter and Converter.
13.1.1 Daily Inspections
Check the following items while the system is in operation.
D
Are there abnormal motor noises or vibration?
D
Is there any abnormal heat?
D
Is the ambient temperature too high?
D
Is the value displayed on the output voltage monitor higher than normal?
13.1.2 Periodic Inspections
Check the following items during periodic maintenance.
To prevent electric shock, turn OFF the power supply to the main circuit and check that the CHARGE indi-
cator and 7-segment display have gone out before performing maintenance operations.
Table 13.1
Periodic Inspection Items
Area
Component
Check
Corrective Action
External terminals, Unit
mounting bolts con
Loose screws
Tighten.
mounting bolts, con-
nectors, etc.
Loose connectors
Tighten.
Heatsink
Build-up of dust and dirt
Blow with dry compressed air of 39.2
¢
10
4
to
58.8
¢
10
4
Pa (4 to 6kg
¡
cm
2
) pressure.
Inverter and
Converter
Printed circuit boards
Accumulation of conductive dust or oil
Blow with dry compressed air of 39.2
¢
10
4
to
58.8
¢
10
4
Pa (4 to 6kg
¡
cm
2
) pressure. If dust and oil
cannot be removed, replace the board.
Converter
Cooling fan
S
For abnormal noise and vibration
S
Whether the cumulative operation time
exceeds 20,000 hours or not.
Replace the cooling fan.
Power elements
Accumulation of dust and dirt
Blow with dry compressed air of 39.2
¢
10
4
to
58.8
¢
10
4
Pa (4 to 6kg
¡
cm
2
) pressure.
Smoothing capacitor
Discoloration or odor
Replace the capacitor or Unit.
Bearing noise
Abnormal noise or increase of noise level
Related to
Vibration
Abnormal vibration
Replace the bearings.
Related to
Bearings
Bearing temperature
Abnormal temperature rise
Grease
No leakage
Remove the cause.
Motor and
Cooling Fan
Operating status
Normal operation
Remove the cause of fan halt or replace the fan if a
fault is found.
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