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Fig. 17: Exchange of the measurement insert qp 150
6.2
Installing the measurement insert
To install the measurement, insert, proceed as follows:
•
Check the sealing surface of the flanged body in the
measurement insert for damage and cleanliness.
•
Check the fit of the gasket "c" (see figure 18) on the interim
cover. The gasket must be properly positioned in the
groove and be free of any damage.
Fig. 18: Gasket "c" of the measurement insert
•
Put the measurement insert into the opening. Please note
the flow direction. The arrow on the measurement insert
and the arrow on the flanged body have to match.
•
Screw in the 8 screws "a" (see figure 15) with 35 Nm.
•
If necessary, fit the user locks.
Warning: All screws "a" (see figure 15) and "b" (see
figure 16) must be screwed.
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.
Heat 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.
Landis+Gyr GmbH
7.
Display
The functional range of the LCD is described in detail in the
attached operating instructions.
8.
Error messages
The meter continuously runs a self-diagnosis and can thus
recognize and display various installation or meter error mes-
sages.
Error
Error
code
FL
Incorrect flow direction
nEG
if necessary, in exchange with:
DIFF
Negative temperature difference
nEG
if necessary, in exchange with:
F0
No flow can be measured
F1
Interruption in the hot side tempera-
ture sensor
F2
Interruption in the cold side tempera-
ture sensor
F3
Electronics for temperature evaluation
defective
F4
Problem with the power supply;
Battery flat;
F5
Short-circuit hot side temperature
sensor
F6
Short-circuit cold side temperature
sensor
F7
Fault in internal memory holding
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.
F9
Fault in the electronics
Note: Reset the message F8 in the parameterization
mode manually or with the service software. All other
error messages are deleted automatically once the
error has been rectified.
9.
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.
Subject to change with prior notice
Service guidelines
Check flow or installation
direction; correct if necessary
Check installation point of the
temperature sensors; exchange
if necessary
Air in the measurement
unit/pipe; bleed air from line
(delivery condition)
Check hot side temperature
sensors; replace if necessary
Check cold side temperature
sensors; replace if necessary
Exchange the meter
Check connection;
Change battery
Check hot side temperature
sensors; replace if necessary
Check cold side temperature
sensors; replace if necessary
Exchange the meter
Measure dependent on error
code. Error message F8 must
be reset by service department.
Exchange the meter
Landis+Gyr GmbH
Humboldtstrasse 64
90459 Nuremberg
Germany
08.11.2018
7
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