Perform the steps in the order as indicated below:
1. To ensure statuses as described are in place, read the VFD Power Down and Door Access
chapter of this manual prior to opening the doors of the VFD,
2. Apply Green/Yellow insulated ground cables from L1, L2, L3 /U1, V1, W1 and T1, T2, T3 /U2,
V2, W2 to protective earth, P.E. Refer to the section of the manual entitled "Grounding,
Cabling, and Shielding Recommendations" which can be found in the chapter entitled
"Electrical Connections". Be sure to obey all local codes strictly for grounding.
3. Perform maintenance as required.
4. Remove the grounding device.
5. Close the doors and replace K2 keys (if applicable) into the Key Interlock Unit (refer to
Figure"VFD Cabinet (front view) ") to release the coded K1 key that can be used to close the
customer circuit breaker.
10.7.2 Part Replacement
WARNING
Siemens Recommendation of Qualied Personnel Only
Siemens strongly recommends that only qualied personnel be allowed to perform
maintenance and replacements on SINAMICS Perfect Harmony™ drives.
Failure to comply with recommendations:
• will invalidate any warranty claims should the drive not perform as designed or parts
become damaged
• may result in serious injury to personnel, which will be the sole responsibility of the
customer
Refer to the chapter of this manual titled Spare Parts for a listing of parts that are customer
replaceable and non-replaceable.
Note
Failures traced to individual power cells require replacement of the entire cell.
10.7.3 Replacing the Filter Media
Filter Media
Convection-cooled drives are equipped with lter media that prevent dust deposits from
accumulating on the power unit components.
Refer to the chapter titled "VFD Power Down and Door Access" prior to replacing the lter media.
Filter media can be replaced during VFD operation.
Maintenance
10.7 Remove and Replace
Type 6SR5 Air-Cooled
72 Operating Instructions, AK, A5E39390112