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7. MAINTENANCE AND INSPECTION
Periodical Inspection
Periodically inspect the inverter as described in the following table to
prevent accidents and to ensure high performance with high-reliability.
Location to Check
Terminals, unit
mounting screws,
etc.
Heatsink
Printed circuit
board
Power elements
and smoothing
capacitor
Cooling fan
Part Replacement
Inverter's maintenance periods are noted below. Keep them as reference.
Part
Cooling fan
Smoothing capacitor
Breaker relays
Fuses
Aluminum capacitors
on PCBs
Note: Usage conditions are as follows:
• Ambient temperature: Yearly average of 30˚C
• Load factor: 80% max.
• Operating rate: 12 hours max. per day
84
Check For
Connection hardware is
properly seated and
securely tightened.
Built up dust, dirt, and debris Blow with dry compressed air :
Accumulation of conductive
material or oil mist
Abnormal odor or
discoloration
Abnormal noise or vibration
Cumulative operation time
exceeding 20,000 hours
Part Replacement Guidelines
Standard Replacement Period
2 to 3 years
5 years
----
10 years
5 years
Solution
Properly seat and tighten
hardware.
4
39.2
10 to 58.8
57 to 85 psi (4 to 6kg / cm )
pressure
Blow with dry compressed air :
4
39.2
10
to 58.8
57 to 85 psi (4 to 6kg / cm
pressure
If dust or oil cannot be
removed, replace the inverter
unit.
Replace the inverter unit.
Replace the cooling fan.
Replacement Method
Replace with new part.
Replase with new part.
(Determine need by inspection.)
Determine need by inspection.
Replace with new part.
Replase with new board.
(Determine need by inspection.)
4
10 Pa,
2
4
10
Pa,
2
)
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