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Preventive Maintainance
3ADW000195R0501 DCS800 Service Manual e e
Ground components
Check the quality of the supply voltage.
3 years preventive maintenance
Following additional actions have to take place:
Replace the cooling fans of units D6 and D7.
How to remove the converter fan in a frame D6
How to remove the converter fan in a frame D7
The manufacturers estimation for the operational time of the cooling fan is:
GR31M: 30,000 hours at 40°C (D6)
GR35C: 30,000 hours at 40°C (D7)
The mayor problem is the failure of the bearings.
Typical lifetime of the cooling fan versus ambient temperature
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