Siemens FUS1010, Operating Instructions Manual, Page: 161 / 298

Troubleshooting
10.1 Troubleshooting
FUS1010 IP65 NEMA 4X & IP66 NEMA 7
160
Operating Instructions, 01/2013, A5E02951520-AC
Error or Message Probable Cause Solution
Re-space Index The measured liquid sonic velocity (Vs) is
more than +/- 25% of the average Vs range.

Ensure proper pipe dimensions and/or Liquid
data entries are correct.
 Properly enter correct Sensor Size into the
meter [Install Sensor] menu.

Confirm sensor spacing is correct by checking
[Install Sensor] menu spacing parameters.
Invalid Setup (use
Direct Mode)
During the Initial Makeup the system
detects invalid Sensor spacing, erroneous
liquid or pipe parameters, or some other
factor that prevents it from completing the
Initial Makeup.
This may be due to one of the following:

An out-of-range data entry.
 An invalid condition (e.g., overlapping Sensors
in Reflect Mode). If selecting Direct Mode does
not resolve, review all site setup and Sensor
installation choices; particularly data entered
for pipe and liquid.

In Reflect Mode the flow meter detects that the
pipe wall signal may impinge upon the liquid
signal. Use Direct Mode instead.
 Press <ENTER>, <Up Arrow>, <Down Arrow>,
or <Left Arrow> to abort install routine.
Continue programming other site data in
anticipation of resolving the difficulty later. Call
technical support for help if necessary.
Low Signal - Press
<ENTER>
During the Initial Makeup the flow meter
decides that the level of the receive signal is
insufficient for proper operation.
Some reasons for low signal are:

Invoking [Install Complete?] on an empty pipe.
 Coupling compound insufficient; not applied or
evaporated. Reapply couplant.

A disconnected or broken Sensor cable.
 The pipe needs to be conditioned at the
mounting location.

Flush out large air bubbles.
 The Sensor cables are defective or not
connected to the correct channel.

The Set Empty routine performed when pipe
was NOT actually empty.
If you locate and correct the improper condition
immediately, press <ENTER> to resume the
installation procedure. Otherwise, press the <Left
Arrow> to abort the installation and conduct a
thorough investigation.
Detection Fault If it appears that the flow meter cannot
complete an Initial Makeup it means that the
pipe and/or liquid conditions do not permit a
receive signal that meets the flow detection
standards. The system will not operate.
Attempt to improve operating conditions by
reinstalling the Sensors at a different spacing
offset, or even at a different location on the pipe.
Switching from Reflect to Direct Mount may solve
the problem. However, operation may not be
possible if there is poor liquid or pipe wall sonic
conductivity.