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en
– Original Instructions
31
pressure feedback signal.
P26 Max RPM set
[ACT
set÷Max
*
]
rpmx10
Maximum pump speed setup.
P27 Min RPM set
[Min
*
÷ACT
set]
rpmx10
Minimum pump speed setup.
6.5.4 Multi-pump twin adjustment configuration parameters
The factory settings do not include the configuration of the twin-pump version for multi-pump twin
operation, in spite of the version being supplied with a communication cable between the two
inverters.
In addition to twin pumps, this mode can also be activated for two single pumps, provided that
they are the same (same code), and that they are connected together through a communication
cable
To activate the function proceed as follows
Disconnect the power supply from the two motors
Check/connect the 3-wire communication cable to the corresponding communication
ports (terminals 15-16-17 for the single-phase version; terminals 5-6-7 for the three-
phase version)
Power both motors
Configure one unit as Master (see parameter P38). In case of twin-pump versions, we
recommend that the motor on the right when looking at the pump from the discharge side
is set as Master.
On the Master unit, select twin adjustment mode (see parameter P39) and the control
mode (see parameter P25)
After configuring the Master unit
, the other unit is automatically configured as “Follower”.
The positive outcome of the configuration will be confirmed by the Follower display
showing the COM LED always on green. Otherwise, and in case of alarms A12 or A13,
refer to Par. 8.1, table 14
NOTICE:
When twin mode is active, any used external ON/OFF contact (terminals 11-12 for the
single-phase version, and terminals 13-14 for the three-phase version) must be
connected in parallel on both units, making sure that the polarity is right.
When the unit is configured as Follower and twin multi-pump communication:
-
works correctly (no A12 alarm, see Par. 8.1, table 14): the START/STOP
operation of button 3 and the modification of the parameters (setpoint included)
are disabled.
-
Does NOT work correctly (A12 alarm active, see Par. 8.1, table 14): the
START/STOP operation of button 3 and the modification of the parameters (P21,
P23, P38, P68) are enabled.
Lack of water:
*
Depending on the type of pump used