Grundfos DDI 209, Инструкция по установке и эксплуатации

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English (GB)
59
Pressure exceeded
If, after three successive strokes, the cut-off
pressure is exceeded, this is recognised as an error:
•
The pump is stopped.
• The error signal relay switches on.
• The LED alternately flashes red and green.
• The last pressure value to be measured is
displayed.
• "RUN", "ERROR" and "bar" flash in the display.
Fig. 60 Display: "Pressure exceeded"
Pump restart attempts:
•
First the pump makes four attempts to restart,
each separated by a 2-second pause, if the
chamber pressure has fallen below the cut-off
pressure (p
act
< p
set
).
• If, after three successive strokes, the cut-off
pressure is exceeded, the pump is stopped
again.
• After four attempts, the pump waits 10 minutes
before attempting to automatically restart again.
• The pump continuously attempts to restart if the
chamber pressure decreases in this way.
Fig. 61 Pump restart attempts
Error correction
• Press the "Start/Stop" button to stop the pump
and prevent it from restarting.
• Check the discharge valve and the installation on
the discharge side and correct any errors,
if necessary.
For maintenance work, see section
10. Maintenance .
• Check and correct the pressure setting,
if necessary.
Once the error has been corrected,
• press the "Start/Stop" button to restart the pump.
– The pump returns to the state it was in before
the error occurred.
Displaying the pressure that has been measured
The pressure that has been measured during the
pump operation can be displayed at any time.
•
Press the "Menu/Info" button twice.
(If only pressed once, the dosed quantity is
displayed.)
– The pressure is displayed for approximately
10 seconds.
9.10.5 Error message – broken cable or faulty
sensor
If the dosing controller and/or the pressure control
function are/is switched on, the missing signal is
recognised and emitted as an error.
A faulty pressure sensor (broken cable) is displayed
as follows:
•
The error signal relay switches on.
• The pump is not stopped!
• The LED flashes red.
• "ERROR" flashes in the display.
Fig. 62 Display: "Broken cable"
Correct error
• Press the "Start/Stop" button twice to confirm the
error and to stop the pump.
• Repair the cable break.
TM
03
65
78
45
06
8.99
ERROR* bar*
Manual
RUN*
TM
03 657
9 450
6
….
Pressure exceeded
Pump running
Pump waiting
2 sec.
10 min. 10 min.
T
M
03
65
80
45
06
2.42
ERROR*
Manual
RUN
l/h