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116
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Operation Instruction of S900 E Series Inverter
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117
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Chapter 8 Precautions for Maintenance and Inspection
8-2 Replacement of parts
The inverter consists of many electronic parts such as
semiconductor devices.
The following parts may deteriorate with age because of their
structures or physical characteristics
leading to reduced performance or fault of the inverter. For
preventive maintenance, the parts must
be replaced periodically.
Use the life check function as a guidance of parts replacement.
Part name
Standard replacement
interval
Description
Cooling fan
3-5 years
Replace (as required)
Smoothing capacitor
5 years
Replace (as required)
Fuse (18.5kw or more)
10 years
Replace (as required)
Relays
---
as required
Replacement years for when the yearly average ambient
temperature is 40
℃
(Without corrosive gas, flammable gas, oil mist,
dust and dirt etc.)
8-3 Trouble shooting
When an alarm (major failures ) occurs in the inverter, the protective
function is activated bringing the inverter to an alarm stop and
the operation panel dispay automaitically changes to any of the
following error (alarm )indications.
If your fault does not correspond to any of the following errors
or if you have any other problem, please contact your sales
representative.
• Alarm display…….. when the protective function is activated,
the operation panel display automatically switches to the above
indication.
• Resetting method………when the protective function is activated,
the inverter output is kept stopped. Unless reset, therefore, the