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ID
Symbols
Message
Cause/Remedy
St
(yellow)
Safety validation mode
Configuration warning
Device is in safety validation mode.
Complete the functional test and confirm that it was successful in the
Functional Safety wizard.
SU
Safety critical device error
Maintenance alarm
Acknowledge the error in menu "Functional Safety". If the device
does not display an error, repeat the safety start up.
Acknowledging safety-related errors (Page 174)
If the problem persists, contact Technical Support.
12.3
Troubleshooting
Symptom
Cause of error
Remedy
Display empty,
no transmission
pulses
No or incorrect supply voltage
Check the voltage at the terminals, the connections and
the wiring.
Display shows
"#####" instead
of the current
measured value
Value too large to appear on the display
Adjust the unit so that a lower value can be displayed,
e.g. by selecting bars instead of millibars.
Pressure units [01] (Page 106)
Below you can find explanations on how to correct problems when enabling Functional Safety.
Information mes‐
sage on the dis‐
play
Cause of error
Remedy
INVALID CFG
ACCES
Write protection via user PIN disabled.
Activate write protection via the user PIN.
Enable user PIN (Page 139)
INVALID CFG
TRNFK
Wrong characteristic curves selected.
Select one of the following characteristic curves:
● Linear, proportional to pressure (PRESS).
● Linear, proportional to level (LEVEL).
● Proportional to flow rate, two-step linear up to the
application point (VSLN2 or MSLN2).
INVALID CFG
LOOPT
Loop current fixed. Loop test or multidrop
mode are enabled.
To return to normal operation, disable the loop test or
multidrop mode.
Loop test [31] (Page 141)
INVALID CFG
SIMUL
Device in simulation mode: Pressure meas‐
ured value is simulated.
Disable simulation to return to normal operation.
Simulate constant pressure values (Page 147)
INVALID CFG
STSIM
Device in simulation mode: Diagnostics are si‐
mulated.
Disable simulation to return to normal operation.
Simulate diagnostics (Page 148)
INVALID CFG
PARAM
Factory settings for Functional Safety are faul‐
ty.
Replace the device.
Diagnostics and troubleshooting
12.3 Troubleshooting
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC
197