User's Manual
Table Of Contents
- 8 Parameter reference
- 9 Service and maintenance
- 10 Diagnosing and troubleshooting
- 11 Technical data
- 12 Dimension drawings
- 12.1 Threaded horn antenna
- 12.2 Threaded horn antenna with extension
- 12.3 Flanged horn antenna
- 12.4 Flanged horn antenna with extension
- 12.5 Flanged encapsulated antenna (2"/DN50/50A sizes only)
- 12.6 Flanged encapsulated antenna (3"/DN80/80A sizes and larger)
- 12.7 Threaded PVDF antenna
- 12.8 Threaded connection markings
- 12.9 Raised-Face flange per EN 1092-1 for flanged horn antenna
- 12.10 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna
- 12.11 Flat-Face flange
- 12.12 Process connection tag (pressure rated versions)
- A Appendix A: Technical reference
- B Appendix B: HART communications
- C Appendix C: Certificates and support
- 13 List of abbreviations
- 14 LCD menu structure
- Glossary
- Index
Diagnosing and troubleshooting
10.3 General fault codes
SITRANS LR250 (HART)
Operating Instructions, 01/2014, A5E32220602-AB
177
Code/
Icon
Meaning
Corrective Action
S: 52
Fail-safe is activated. Possible causes:
1. hardware failure
2. memory failure
3. Fail-safe LOE timer expired– possible
causes: faulty installation, antenna material
buildup, foaming/other adverse process
conditions, invalid calibration range.
For 3:
• Correct configuration; ensure installation is correct;
• no antenna buildup;
• adjust process conditions to minimize foaming/other
adverse conditions;
• correct calibration range.
If fault persists, or for 1 and 2, contact your local Siemens
representative.
S: 53
* Configuration lost: one or more parameter
settings have been lost. This may occur after a
firmware upgrade causes user parameters to
be reset.
Restore user parameters using SIMATIC PDM.