English (GB)
37
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
6.1 Connecting the signal lines for
DDI 209
and
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.
Fig. 33
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.
Fig. 34
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.
9.2.4 Diaphragm leakage sensor (MLS)
As an option, the pump can be equipped with a
sensor for diaphragm leakage detection.
The electronics automatically detects whether a
sensor is connected. The following appears in the
display.
Fig. 35
Display: MLS sensor is connected
When a diaphragm leakage is detected by the
sensor,
•
the pump is switched off.
•
The error signal relay switches on.
•
The LED flashes red.
•
"MBS" (MLS) and "ERROR" flash in the display.
Fig. 36
Display: diaphragm leakage detected
Once the error has been corrected (the contact is no
longer closed),
•
press the "Start/Stop" button to acknowledge the
error.
•
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.
9.2.5 Hall sensor / motor monitoring
If the pump has existing strokes to process, the Hall
sensor checks whether the drive is turning. If the
drive motor is blocked, e.g. due to excess
counter-pressure in the dosing system, this is
detected and indicated by the integrated motor
monitoring function.
•
The error signal relay switches on.
•
"1/min", "bar" and "ERROR" flash in the display.
Fig. 37
Display: motor monitoring
•
The pump is stopped.
•
The red LED flashes.
For possible errors and their correction, see section
11. Fault finding chart
.
Once the error has been corrected,
•
press the "Start/Stop" button to acknowledge the
error.
T
M
03
65
96
45
0
6
TM
03
65
97
45
06
Manual
l/h
Stop
1.20
Manual
l/h
Stop
1.20
TM
03 65
98 45
06
TM
03
65
99
45
06
T
M
03
63
60
45
06
Manual
l/h
1.20
MBS
Manual
l/h
Stop
1.20
ERROR MBS
Analog
Run
0
ERROR
1/min
bar
Analog
Run
0
ERROR
1/min
bar
