How To Use The Control Unit; Menu Levels; General Functions Of The Control Unit; Two-Stage Tank-Empty Signal - Grundfos DDI 222 Instrucciones De Instalación Y Funcionamiento

9. How to use the control unit

First see sections
7. Start-up/shutdown
Note
Only the additional functions are described in this
section.

9.1 Menu levels

Menu levels used in the control unit
• First function level: for selecting and setting the operating
modes of the pump (Manual, Contact, Analog), performing the
batch and timer functions and starting the pump.
• Second function level: for setting and viewing additional
functions, selecting and setting the batch and timer functions
and setting the access code to protect the pump against
unintentional or unauthorised access to pump settings.
• Service level: for setting the pump type and the unit of display
for the dosing flow (l/h or gal/h) and setting the inputs and
outputs.
Saving user settings
The pump settings are automatically saved approximately every
10 minutes and remain as they are even after the power supply
has been switched off.

9.2 General functions of the control unit

9.2.1 Suction
If the "Start/Stop" button is pressed for longer than 1 second, the
pump switches to continuous operation for as long as the button
is held down (e.g. for suction).
This happens regardless of the selected operating mode.
(In batch or timer mode, the pump has to be stopped first.)
9.2.2 Locking "run"
The pump can be locked to avoid manual stopping.
When activating this function (service level), the pump starts
running with the present settings and cannot be stopped using
the "Start/Stop" button.
It is still possible to acknowledge error messages using the
"Start/Stop" button.
Stopping the pump when the locking "run" is activated
• If remote on/off is connected, use remote off.
• Disconnect the pump from the power supply.
For "Batch manual", the "Run" button should not be
locked as the pump then runs in continuous
Note
operation.
5. Installation ,
and 7.2 Operating the pump

9.2.3 Two-stage tank-empty signal

This function is used to provide a warning when the tank is almost
empty and to switch off the pump when the tank is empty. To use
.
the pre-empty signal, ensure that the suction line is equipped with
two float switches.
Pre-empty signal
The pre-empty signal can be an error signal or a pre-empty signal
at socket 3. For a pre-empty signal, relay 1 must be set to
"Pre-empty signal". See sections

9.7.1 Modifying the switch assignment

When the contact of the corresponding float switch closes,
• the error signal relay or pre-empty signal relay switches on,
but the pump is not switched off.
• The LED flashes red.
• The empty-signal symbol flashes in the display.
Stop
Fig. 18 Display: pre-empty signal
Once the error has been corrected,
• the error signal relay or pre-empty relay switches off.
• The pump returns to the state it was in before the error
occurred.
Empty signal
When the contact of the corresponding float switch closes,
• the pump is switched off.
• The error signal relay switches on.
• The LED flashes red.
• The empty-signal symbol lights up in the display.
Stop
Fig. 19 Display: empty-signal symbol
Once the error has been corrected,
• the pump starts running again (if it was running before).
• The error signal relay switches off.
• The pump returns to the state it was in before the error
occurred.
6. Electrical connections
.
Manual
1.20
l/h
Manual
1.20
l/h
and
21