Instruction manual

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.
 Part Replacement
Inverter’s maintenance periods are noted below. Keep them as reference.
131
Location to Check
Terminals, unit
mounting screws,
etc.
Heatsink
Connection hardware is
properly seated and
securely tightened.
Properly seat and tighten
hardware.
Check For Solution
44
2
Built up dust, dirt, and debris Blow with dry compressed air :
39.2  10 to 58.8  10 Pa,
57 to 85 psi (4 to 6kg / cm )
pressure
Cooling fan Abnormal noise or vibration
Cumulative operation time
exceeding 20,000 hours
Replace the cooling fan.
Replace the inverter unit.Abnormal odor or
discoloration
Power elements
and smoothing
capacitor
Accumulation of conductive
material or oil mist
Printed circuit
board
Blow with dry compressed air :
39.2  10
4
to 58.8  10
4
Pa,
57 to 85 psi (4 to 6kg / cm
2
)
pressure
If dust or oil cannot be
removed, replace the inverter
unit.
Part
Part Replacement Guidelines
Standard Replacement Period
Cooling fan
Smoothing capacitor
Breaker relays
Fuses
Aluminum capacitors
on PCBs
Replacement Method
Replace with new part.
Replace with new part.
(Determine need by inspection.)
Determine need by inspection.
Replace with new part.
Replace with new board.
(Determine need by inspection.)
2 to 3 years
5 years
----
10 years
5 years
Note Usage conditions are as follows:
• Ambient temperature: Yearly average of 30˚C
• Load factor: 80% max.
• Operating rate: 12 hours max. per day