Operation With Specific Pre-Defined Flow Sensor - DAB MCE-150/P Installations- Und Wartungsanleitungen

The algorithm used, measures the various sensitive parameters and analyses the unit status to detect the
presence and entity of the flow. For this reason, and to avoid false errors, correct parameter settings are
fundamental, and in particular:

Ensure that there are no system oscillations during regulation (if this occurs, adjust parameters GP
and GI section 6.6.4 and 6.6.5)

Enter the correct rated current setting RC

Set an adequate minimum flow FT

Set the correct minimum frequency FL

Set the correct direction of rotation
WARNING: the self-adaptive mode is not allowed on multi-inverter systems.
IMPORTANT: In both operating modes the system is able to detect the lack of water by measuring the current
absorbed by the pump and comparing it with the parameter RC (see 6.5.1). If the maximum operating
frequency FS is set with a value that does not enable absorption of a value close to the current under full load
of the pump, false water failure errors (BL) may occur. In this case, remedy the situation as follows: turn on
the utilities to reach the frequency FS and at this value, check pump absorption (easily seen on phase current
parameter C1 in the User menu), then set the current value reading on RC.
6.5.9.1.1 Fast self-learning method for auto-adaptive mode
The self-learning algorithm is adaptable to various systems automatically on acquisition of information on
the type of system.
The system set-up process can be shortened by using the quick learning the procedure:
1) Turn on the unit or, if already powered, press MODE SET + - simultaneously for 2 seconds to
generate a reset.
2) Enter the Installer menu (MODE SET -) set FI to 0 (no flow sensor) then in the same menu go to
item FT.
3) Turn on a utility and run the pump.
4) Slowly turn off the utility to reach minimum flow (utility closed) and when this value stabilises, note
the corresponding frequency.
5) Wait 1-2 minutes for the simulated flow reading; this is confirmed by shutdown of the motor.
6) Turn on a utility to achieve a frequency that is 2 – 5 [Hz] greater than the previous frequency
reading, and then wait 1-2 minutes for another shutdown.
IMPORTANT: the method is only effective if, while gradually closing the utility in point 4) the frequency
remains at a fixed value through to reading of the flow VF. It should not be considered a valid
procedure if, after closure, frequency reaches 0 [Hz]; in this case the operations from point 3 must be
repeated; otherwise leave the unit to self-learn for the time interval specified above.
6.5.9.2

Operation with specific pre-defined flow sensor

This applies both to single and multiple sensors.
Use of the flow sensor enables effective measurement of the flow and the possibility of operation in special
applications.
On selection of one of the pre-defined sensors available, the diameter of the pipeline must be entered in inches
in the page FD to ensure correct flow readings (see section 6.5.10).
On selection of a pre-defined sensor, the setting of KF is disabled automatically. The parameter disabled
message is displayed by means of an icon with a padlock.
ENGLISH
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