Specifications

SED2 VFD Startup, Operation, and Maintenance Manual
78 Siemens Building Technologies, Inc.
Maintenance
Perform SED2 maintenance semi-annually. Estimated maintenance time
is one hour.
Prerequisites
1. Confer with customer and log any comments about specific SED2s.
2. Verify with customer that SED2 can be serviced and explain the
service steps.
3. Document last trip error (if any).
4. Verify SED2 Emergency Services are de-energized.
5. De-energize unit.
6. Follow standard lockout, tag-out procedures and verify that input
power is removed.
General Inspection and Cleaning
NOTE: See the appropriate sections in this manual for mechanical
and electrical installation instructions.
1. Open unit.
2. Inspect unit and verify that all connections have continuity.
3. Visually inspect unit for signs of arching or overheating.
4. Vacuum and dust unit interior using a non-static generating device.
5. Verify environmental conditions conform to drive specifications.
6. Inspect outer casing for cleanliness and corrosion.
Muffin Fan Inspection and Cleaning
1. Clean dirt or debris from fan housing and blades.
2. Check fan bearings.
• You should not be able to move the blades forward or backward.
• The blades should free wheel and not appear to be binding.