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ID
Icons
Message
Cause/Action
77
Internal error in sensor
Contact your local Siemens representative.
78
Unstable measurement
condition
Check if air is present in the liquid and that the flowmeter is
operated within its specifications.
79
Auto filtering
Check that the flowmeter is operated within its specifica‐
tions. Check other alarms to rule out HW malfunction.
87
Sensor startup
Unplug and reconnect the sensor cable. If the diagnostic
persists after the specified startup time, restart the device.
If the problem persists, contact Technical Support.
10.2.2
Alarm messages
In the following tables the bits for alarm group 1 and alarm group 2 can be found along with
possible causes and directions for corrective action.
Alarm group 1 (Modbus address 3012)
Bit
Diagnostic
Action
4
5
Sensor supply volt. out of range
Contact Siemens customer support
6
7
8
9
Temperature measurement fault
Contact Siemens customer support
10
11
12
13
Flow values not valid
Can be due to problems with measured fluid or hardware malfunction. If the
failure continues then contact Siemens customer support
14
Invalid calibration data
Contact Siemens customer support for recalibration
15
Invalid compensation data
Contact Siemens customer support
17
18
Malfunction in Pickup Amplitude
Contact Siemens customer support
23
24
25
Malfunction in sensor driver
Contact Siemens customer support
26
Unstable driver oscillation
Contact Siemens customer support
27
Massflow out of specification
Reduce the flow. If the failure continues then contact Siemens customer support
28
Volumeflow out of specification
Reduce the flow. If the failure continues then contact Siemens customer support
29
Density out of specification
Contact Siemens customer support
30
Fluid temp. below limit
Increase the fluid temperature. If the failure continues then contact Siemens
customer support
31
Fluid temp. above limit
Reduce the fluid temperature. If the failure continues then contact Siemens
customer support
Diagnostics and troubleshooting FCT010
10.2 Fault codes and corrective actions
SITRANS MASS 2100 & FC300 (FCT010/DSL)
98
Operating Instructions, 06/2020, A5E39788682-AB