Pump Safety Functions - Grundfos DDI 222 Montage- Und Betriebsanleitung

9.15 Pump safety functions

The DDI 222 pump is equipped with various safety functions as
standard, which are indicated by the following indicators and
behaviour of the pump.
Safety functions
Designation Error
Excess pressure in the
dosing head, or motor
Power off.
power consumption too
high.
Clogged discharge line /
Blocking safety.
blocked motor.
When the pressure
control function is
switched on: Excess
Pressure control (can be
pressure in the dosing
switched on and off).
head (with pressure
sensor) or motor power
consumption too high.
Diaphragm leakage
Diaphragm leakage.
detection (optional).
Flow Monitor
See section
(dosing controller).
Pump behaviour
The pump stops. An
attempt to restart
automatically is made
every 10 minutes.
The pump stops after 1
stroke.
The pump stops after 3
strokes. An attempt to
restart automatically is
made every 10 minutes
up to 5 times with an
increasing number of
strokes.
The pump starts running
again (in emergency
mode).
9.10 Flow Monitor .
Behaviour after error
LED/display/relay
removal
The LED flashes
red/green. Restart after error
"ERROR", "bar" and confirmation and
"l/min" appear in the pressing the "Start/Stop"
display. button, or on an
The error signal relay automatic restart attempt.
switches on.
The LED flashes red.
"ERROR", "bar" and Restart after error
"l/min" appear in the confirmation and
display. pressing the "Start/Stop"
The error signal relay button.
switches on.
Restart after error
The LED flashes
confirmation and
red/green.
pressing the "Start/Stop"
"ERROR" and "bar" flash
button, or on an
in the display.
automatic restart attempt.
The LED flashes red.
"ERROR" and "MBS" The error signal relay
flash in the display. switches off after error
The error signal relay confirmation.
switches on.
47