User's Manual

A5E32337683 SITRANS LR260 (HART) – OPERATING INSTRUCTIONS Page 93
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B: Troubleshooting
Operation Troubleshooting
Operating symptoms, probable causes, and resolutions.
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 pro-
cess conditions, invalid calibration
range.
For 3): Correct configuration; ensure
installation is correct; no antenna
material buildup; adjust process
conditions to minimize foaming/
other adverse conditions; correct
calibration range. If fault persists, or
for 1) and 2), contact your local Sie-
mens 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.
Symptom Cause Action
Display shows
S: 0 LOE
level or target is out of
range
• check specifications
• check 2.2.1.6. Low Calibration Pt.
(LOW CALIB. PT.)
• increase 2.2.4.5.1. Echo Confidence
Display shows
S: 0 LOE
material build-up on
antenna
• clean the antenna
• re-locate SITRANS LR260
Display shows
S: 0 LOE
location or aiming:
• poor installation
• flange not level
• check to ensure nozzle is vertical
•use
2.2.5.2. Auto False Echo
Suppression
and check 2.2.5.3. Auto
Suppression Range
to ensure nozzle
protrudes from end of vessel nozzle.
Display shows
S: 0 LOE
antenna malfunction:
• temperature too high
• physical damage
• check 3.14.1. Current Internal
Temperature (CURR. INTERN.
TEMP.)
•relocate
General Fault Codes (Continued)
Code /
Icon
Meaning Corrective Action