UH50 Ultrasonic Heat Meter
Installation and Service Instructions
UH 206-101c
Page 8 / 8
Error messages
The heat meter constantly performs self-diagnostics
and can display various error messages.
Error
Error / action to be taken:
code:
F0
No flow;
Air in measuring unit / pipe, vent pipe
F1
Interruption of flow sensor
F2
Interruption of return sensor
F3
Electronic for temperature evaluation defective
F4
Battery empty; replace!
F5
Short-circuit flow sensor
F6
Short-circuit return sensor
F7
Fault in the internal memory
F8
F1, F2, F3, F5 or F6 pending for longer than 8 hours.
No more measurements are performed.
F9
Error in the electronics
Message F8 has to be reset in parameter setting
mode (manually, PappaWin). All other error
messages are cleared automatically once the error
has been corrected.
Functional details
If the response thresholds are exceeded and the
flowrate and temperature difference are positive, the
quantity of thermal energy
and the
volume
are
summated. In the
segment test,
all segments of the
display are switched on for test purposes.
On the
yearly set day,
the meter readings for
quantity of heat and volume, the values for the
service life maxima and the flowrate and missing
times are placed in the
previous year memory
.
The
flowrate, heat power,
and
temperature
difference
are acquired with the correct sign. If the
response threshold is not reached, the value is
preceded by a
u
. The current
temperatures
are
shown together on one line of the display as
integers in
°C
.
To calculate the maximum, the heat power and
flowrate are averaged over a
measuring period
of,
for example, 60 min. The
maximum values
from the
average calculation are preceded by
Ma
on the LC
display.
The 8-digit
property number
(also the secondary
address in M-bus operation), can be set in
parameter setting mode. The
unit number
is
assigned by the manufacturer.
The
operating time
is counted from the first time
the power supply is connected.
Missing times
are
summated, if an error is pending that prevents the
heat meter from measuring. The
date
is
incremented daily.
The type of installed
modules
is displayed. If an M-
but module is installed, the primary and secondary
address will be displayed on the following lines.
The number for the
firmware version
is assigned
by the manufacturer.
Notes
•
Regulations on the use of heat meters must be
observed, see EN 1434, Part 6!
In particular, cavitation in the system must be
avoided.
•
Heat meters up to DN25 may only be installed
with directly immersed sensors according to
German calibration law!
•
Install the unit in such a way that no water can
enter the electronic unit during operation.
•
All information given on the data sheet of the heat
meter must be observed.
•
User seals may only be removed by authorized
persons for service purposes and must be
replaced afterwards.
•
No later than 30 seconds after installation, the
heat meter detects the plugged modules
automatically and is ready for communication or
pulse output.
•
The type of modules plugged can be displayed in
the service loop depending on how the display is
parameterized.
•
For fast pulses, the parameters must be set
accordingly with the PappaWin software.
•
Up-to-date versions of all instructions can be
found in the Internet at
www.landisgyr.com
Gyr GmbH
Humboldtstr. 64
D-90459 Nuremberg
Germany
