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Siemens
Ultrasonic heat and cooling energy meters UH50..
CE2N5324en
Building Technologies
2013-01-14
The processor unit stores the meter readings of energy, volume, the tariff register,
missing time, and flow rate measuring time as well as the current maximum of flow
rate, power, temperature differential, flow temperature, and return temperature with
their date stamps on a yearly set day.
The processor unit stores the meter readings of energy, volume, the tariff register,
missing time, and flow rate measuring time as well as the monthly maxima of flow
rate, power, temperature differential, flow temperature and return temperature with
their date stamp
for up to 60 months
on the set day of each month.
The standard time used is the Central European Time (CET). If daylight-saving
time is activated, storage will be performed accordingly.
Previous year’s values and monthly values can also be read out via the optical and
the 20-mA interface.
The meter performs constantly self-diagnostics and can display various error
messages.
Error code Error
Notes on service
FL
nEG
Wrong direction of flow
Check flow or installation direc-
tion; correct if necessary
If necessary, alternating with:
DIFF
nEG
Negative temperature differential Check place of installation of
sensors; replace if required
If necessary, alternating with:
F0
Flow cannot be measured
Air in the measuring sec-
tion/pipe; vent the pipe (as sup-
plied)
F1
Interruption in the flow tempera-
ture sensor
Check sensor; replace if re-
quired
F2
Interruption in the return tem-
perature sensor
Check sensor; replace if re-
quired
F3
Electronics for temperature as-
sessment defective
Replace meter
F4
Battery exhausted; problem in
connection with power supply
Replace battery; check connec-
tion
F5
Short-circuit in the flow tempera-
ture sensor
Check sensor; replace if re-
quired
F6
Short-circuit in the return tem-
perature sensor
Check sensor; replace if re-
quired
Current tariff,
at 2-second intervals with threshold value 1
Measuring interval for flow rate
Measuring interval for 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, at 2-second intervals
Valency for energy pulses *)
Valency for volume pulses *)
Pulse duration in ms *)
*) For "fast pulses"
Previous year’s values
Monthly values
Note
Error messages