Siemens UH50 Series Installation Instructions

Siemens Building Technologies CE2M5324xx 15.05.2015 14
Error messages for incorrect installation:
Error “incorrect flow direction (negative)“
Check that the flow direction arrows on the volume measure-
ment unit match the flow direction of the system. If the direc-
tions do not match, turn the volume measurement unit through
180°.
Error “negative temperature difference“
Check whether the temperature sensors are installed
correctly. If the sensors are not installed correctly, change
the installation position of the temperature sensors.
Heating meter:
Temperature sensor in the flow-pipe with higher tempera-
tures; temperature sensor in return-pipe with lower tempera-
ture
Cooling meter:
Temperature sensor in the flow-pipe with lower temperatures;
temperature sensor in return-pipe with higher temperature
Note: When the appliance is idle, these messages may
appear even if there has been no incorrect installation.
6. Display
The functional range of the LCD is described in detail in the
attached operating instructions.
7. Error messages
The meter continuously runs a self-diagnosis and can thus
recognise and display various installation or meter error mes-
sages.
Error
code
Error
Service guidelines
FL
nEG
Incorrect flow direction
Check flow or installation
direction; correct if necessary
if necessary in exchange with:
DIFF
nEG
Negative temperature difference
Check installation point of the
temperature sensors; exchange
if necessary
if necessary in exchange with:
F0
No flow can be measured
Air in the measurement
unit/pipe; bleed air from line
(delivery condition)
F1
Interruption in the hot side tempera-
ture sensor
Check hot side temperature
sensors; replace if necessary
F2
Interruption in the cold side tempera-
ture sensor
Check cold side temperature
sensors; replace if necessary
F3
Electronics for temperature evaluation
defective
Exchange the meter
F4
Problem with the power supply;
Battery flat;
Check connection;
Change battery
F5
Short-circuit hot side temperature
sensor
Check hot side temperature
sensors; replace if necessary
F6
Short-circuit cold side temperature
sensor
Check cold side temperature
sensors; replace if necessary
F7
Fault in internal memory holding
Exchange the meter
F8
Errors F1, F2, F3, F5 or F6 for longer
than 8 hours, recognition of attempts
to manipulate. No further measure-
ments are carried out.
Measure dependent on error
code. Error message F8 must
be reset by service department.
F9
Fault in the electronics
Exchange the meter
Note: Reset the message F8 in the parameterisation
mode manually or with the service software. All other
error messages are deleted automatically once the
error has been rectified.
8. Notes
The following applies for MID conforming appliances in Ger-
many: For new installations in pipework less than or equal to
DN 25, the installation of short sensors must only be made if
they are directly immersed.
Note: The documentation made available or acquired
along with our products (appliances, applications,
tools etc.) must be read carefully and completely prior
to use.
We require the users of the products and documents
to be appropriately authorised and trained and to have
appropriate specialist knowledge so that the products
can be used correctly.
Additional information about the products and applica-
tions can be found at:
 Your nearest Siemens location
www.siemens.com/sbt or your system supplier
Please be aware that Siemens will not be held legally
liable for any damage which results from non-
adherence to or inappropriate adherence to the points
above.
Siemens Schweiz AG
Building Technologies Division
International Headquarters
Gubelstrasse 22
CH-6301 Zug
Switzerland
 2015 Siemens Schweiz AG

Siemens UH50 Series Specifications

General

Type	Ultrasonic flowmeter
Accuracy	±1% of reading
Communication	HART
Power Supply	24 V DC
Output	4 to 20 mA
Operating Temperature	-20 to +60 °C (-4 to +140 °F)
Resolution	0.001 m/s