Operating Instructions

Maintenance
Siemens Building Technologies, Inc. 83
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 and inspect and verify that all connections have continuity.
2. Visually inspect unit for signs of arching or overheating.
3. Vacuum and dust unit interior using a non-static generating device.
4. Verify environmental conditions conform to drive specifications.
5. Inspect outer casing for cleanliness and corrosion.
Muffin Fan Inspection and Cleaning
1. Clean dirt or debris from fan housing and blades.
2. Verify fan blades and fan bearings as follows:
• blades do not move forward or backward.
• blades are free-wheel and not binding.
• fan does not make any mechanical whining sound