ID Symbols Message Cause/Remedy
FE Loop current read back er‐
ror
The loop current does not correspond to the expected value.
Check DAC trim settings.
Restore to factory DAC calibration.
If the problem persists, contact Technical Support.
FJ Process conditions out‐
side the specification
Uncertain values due to process conditions.
Check installation for abnormal operating conditions.
Fn Connection failure to sen‐
sor subsystem.
Potential product damage.
Restart the device.
If error continues, sensor subsystem may have a defect.
Repair required. Contact Technical Support.
Fo Sensor break Potential product damage.
Sensor has malfunctioned.
A replacement of sensor is recommended.
Contact Technical Support.
Fr Internal power supply is
out of allowable range.
A replacement of the device is recommended.
Contact Technical Support.
FS Electronics defect Defect of device electronics.
A replacement of the device is recommended.
Contact Technical Support.
SA Non-volatile memory
check failure
Device electronics error.
Restart the device.
If error continues, device electronics may have a defect.
Repair required. Contact Technical Support.
Sb Volatile memory check fail‐
ure
Device electronics error.
Restart the device.
If error continues, device electronics may have a defect.
Repair required. Contact Technical Support.
SC
(red)
Invalid device configura‐
tion
One or more of parameters are set to invalid values.
Review configuration values and adjust as necessary.
Diagnostics and troubleshooting
12.2 Diagnostic messages
SITRANS P320/P420 (mA/HART)
188 Operating Instructions, 06/2018, A5E44852162-AA
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