Siemens ULTRAHEAT T550 Series Operating Instructions Manual page 12

Max. flow on the set day,
in 2-sec. cycles with date stamp
Max. power on the set day,
in 2-sec. cycles with date stamp
Max. temperatures on the set day,
in 2-sec. cycles with date stamp
MV for hot side or MR for cold side
Missing time count on the set day
After the last display the previously selected set day is dis-
played once again.

To select the next set day, press button 1.
Stop "LOOP 3"
To go into the next loop early, proceed as follows:

Select a monthly value with button 2.

Press button 1.
Service loop 4 "LOOP 4"
Service loop 4 displays appliance parameters.
The LCD displays the following values one after the other:
Head of the loop
Current tariff,
in 2-sec. cycles with threshold value 1
Measurement interval flow
Measurement interval temperature
Module 1: M-Bus module
M-Bus primary address 1
M-Bus secondary address 8-digit
Module 2: Pulse module; channel 1 = energy,
channel 2 = volume; in 2-sec. cycles
Value for energy pulses *)
Value for volume pulses *)
Pulse duration in in ms *)
*) for „fast pulse"
3.3 Previous year's values
The meter saves the following values on the yearly set day

Energy (meter status)

Volume (meter status)

Tariff register (meter status)

Missing time (meter status)

Flow measurement time (meter status)
and the maxima with date stamp for

Flow

Power

Temperature difference

Temperature hot side

Temperature cold side
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3.4 Monthly values
The meter stores the following values for 60 months on the
monthly set day

Energy (meter status)

Volume (meter status)

Tariff register (meter status)

Missing time (meter status)

Flow measurement time (meter status)
and the maxima with date stamp for

Flow

Power

Temperature difference

Temperature hot side

Temperature cold side
The monthly values can be read via the optical and the 20 mA-
interface.
Note: Central European Time (CET) applies as the
standard time. During summer time the storage takes
place at the corresponding times.
4. Error Messages
The meter continuously runs a self-diagnosis and can thus
recognise and display various installation or meter error mes-
sages.
The error message F0 means that no flow measurement is
possible, due to air in the volume measurement unit for exam-
ple; the system must be vented carefully.
The error message F4 means the battery must be replaced.
When any of the error messages F1, F2 or F5, F6, F8 are
displayed, the temperature sensors are defective. The mes-
sages F3, F7, F9 mean a defect in the electronic.
Contact the service department in all these cases.
5. Functional Details
If the respective operation thresholds are exceeded and flow
and temperature difference are positive, the meter summates
the energy and the volume. All segments of the display are
switched on for control purposes during the segment test.
On the yearly set day, the meter status for energy and volume,
the values for the maxima and flow and missing hours are
logged in the previous year's archive.
Flow, power and temperature difference are recorded with the
appropriate +/- signs. If the operation threshold has dropped a
"u" is displayed in front. The current temperatures are dis-
played to an accuracy of 0.1 °C.
For maximum formation the power and flow over the meas-
urement period (of e.g. 60 mins.) are averaged. The maximum
values of the average value formation are marked with "Ma" in
front. The maximum values of the temperatures are marked
with "MV" or "MR".
The 8-digit property number (also the secondary address for
M-Bus operation) can be set in the parameterisation mode.
The meter number is issued by the manufacturer.
The operating time is counted from the first connection of the
power supply. Missing hours are summated if there is an error
and the meter is thus unable the measure. The date is incre-
mented on a daily basis.
The type of modules installed is displayed. If an M-Bus module
is installed, the primary and secondary address is displayed in
the subsequent lines.
The number for the firmware version is issued by the manufac-
turer.
CE2B5324xx 08.08.2017 10