Error Codes And Ids; Exchange; Reading; Technical Data - Ista Ultego III Smart Installation Instruction

G.83.0170 - Release 8.1.0 CH 2014
ista International GmbH - Grugaplatz 2 - 45131 Essen
http://www.ista.com
2. Check the heating system for impermeability and ven-
tilate it thoroughly.
3. Message F0 disappears after 10 s at the latest. Then
check the measured "Temperatures" and "Flow" val-
ues for plausibility.
NOTICE
►
If the measured val-
ue is below the re-
sponse threshold, a
'u' is displayed as the
leading digit in the flow, output and tem-
perature display.
4. Remove air from the system until the flow indication is
stable.
5. Attach the seals to the screw fittings and the sensors.

Exchange

1. Note the direction of flow and compare with the arrow
on the meter.
2. Close the shut-off devices in front and behind the in-
stallation site.
3. Remove the seals.
4. Detach the calculator from the wall, if applicable.
5. Remove the temperature sensor from the tee, ball
valve or immersion sleeve.
6. Dismount meter.
7. Remove seals.
8. For more see installation from point 4 onward.

Reading

On every monthly reporting date, the calculator stores the
following values for 24 months:
▪
Thermal energy (meter reading)
▪
Volume (meter reading)
▪
Off-hours meter (meter reading)
▪
Max. flow with date and time
▪
Max. performance with date and time
▪
Max. flow and return temperature with date and time
One can read the meter in two ways:
1.Via the optical interface
2.Manually via the display loops

Error codes and IDs

The heat meter carries out self-diagnostics continuously
and can therefore indicate various installation and device
errors:
Error Error
code
FL nEG Wrong flow direction Check / correct the
DIFF nEG Negative tempera-
ture difference
F0 no measurable flow
F1-F3, F5 Temperature mea-
- F6 surement error
F4 Battery empty
F7 Fault in the internal
memory operation
F8 Tampering detected,
no more measure-
ments are taken
F9 Faults in the elec-
tronics

Technical data

▪
Ambient class: A (according to EN 1434) for indoor in-
stallation
▪
Mechanical class: M1 acc. to 2004/22/EG (Measure-
ment Instruments Directive)
▪
Electromagnetic class: E1 acc. to 2004/22/EG (Mea-
surement Instruments Directive)
▪
Storage temperature: -20 °C to 60 °C
▪
Max. altitude: 2000 m above sea level
▪
Ambient humidity: < 93 % RH at 25 °C, non-condensing
Technical data of the calculator
▪
Ambient temperature: +5 °C - +55 °C
▪
Temperature range: 0 °C - 95 °C
▪
Temperature difference: 3 K - 80 K
Action
flow or installation
direction
Check / replace the
place in which the
sensors are installed
Air in measuring sec-
tion/pipe, vent the
pipe (as-delivered
condition)
Replace the meter
Replace the meter
Notify service depart-
ment
Replace the meter
Notify service depart-
ment
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