Page 82 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS A5E32337695
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D: Troubleshooting
General Fault Code
Note: Some faults cause the device to go to Failsafe mode (Fault 52). These are indicated
with an asterisk (*).
Code Meaning Corrective Action
S:0 * The device was unable to get a measurement
within the Failsafe Timer period. Possible
causes: faulty installation, antenna buildup,
foaming/other adverse process conditions,
invalid calibration range.
Ensure installation details are
correct. Ensure no antenna buildup.
Adjust process conditions to
minimize foam or other adverse
conditions. Correct range
calibration. If fault persists, contact
your local Siemens representative.
S:2 * The device is operating in a low power
condition that is outside its operating range.
As a result, a valid measurement has not been
taken for the failsafe timer period, and the
device will be put into failsafe mode.
Correct the power supply
(resistance or voltage).
S:3 Device is nearing its lifetime limit according to
the value set in Maintenance Required Limit.
Replacement is recommended.
S:4 Device is nearing its lifetime limit according to
the value set in Maintenance Demanded Limit.
Replacement is recommended.
S:6 Sensor is nearing its lifetime limit according to
the value set in Maintenance Required Limit.
Replacement is recommended.
S:7 Sensor is nearing its lifetime limit according to
the value set in Maintenance Demanded Limit.
Replacement is recommended.
S:8 Service interval as defined in Maintenance
Required Limit has expired.
Perform service.
S:9 Service interval as defined in Maintenance
Demanded Limit has expired.
Perform service.
S:11 Internal temperature sensor failure. Repair required: contact your local
Siemens representative.
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