Instruction manual

7. Maintenance and Inspection
159
 Part Replacement
Inverter’s maintenance periods are given below. Keep them as guide-
lines.
Part Replacement Guidelines
Note: Usage conditions are as follows:
• Ambient temperature: Yearly average of 30°C
• Load factor: 80% max.
• Operating rate: 12 hours max. per day
Part Standard
Replacement
Period
Replacement Method
Cooling fan 2 to 3 years Replace with new part.
Smoothing capacitor 5 years Replace with new part. (Determine
need by inspection.)
Breaker relays - Determine need by inspection.
Fuses 10 years Replace with new part.
Aluminum capacitors
on PCBs
5 years Replace board. (Determine need
by inspection.)