Periodical Inspection Periodically inspect the inverter as described 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. 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 Location to check Check for Solution Terminals, unit mounting screws, etc. Connection hardware is properly seated and securely tightened. Properly seat and tighten hardware. Heatsink Built up durst, and debris Blow with dry compressed air:
39.2 x 104 to 58.8 x 104 Pa, 57 to 85 psi (4 to 6kg / cm2) pressure. Printed circuit board Accumulation of conductive material or oil mist Blow with dry compressed air: 39.2 x 104 to 58.8 x 104 Pa, 57 to 85 psi (4 to 6kg / cm2) pressure If dust or oil cannot be removed, replace the inverter unit. Power elements and smoothing capacitor Abnormal odor or discoloration Replace the inverter unit. Cooling fan Abnormal noise or vibration Cumulative operation time Replace the cooling fan. 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. Aluminium capacitors on PCBs 5 years Replace with new part. (Determine need by inspection.)