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Troubleshooting
Fault description
The "Level" symbol
appears flashing on
the LCD screen, plus the error message
'Level error' E-33-3 and the pump stops.
The symbol "External"
flashing on the LCD screen plus the error
'Memory overflow' E-34-3 and the
message
pump stops.
The symbol i < 4mAappears flashing on the
LCD screen plus the error message
4mA' E-35-3 and the pump stops.
The symbol i > 20mAappears flashing on
the LCD screen plus the error message
'Under 20 mA' E-36-3 and the pump stops.
The symbol "Flow"
FLOWappears
flashing on the LCD screen plus the error
'Defective stroke dosing' E-37-3
message
and the pump stops.
The symbol "Membrane" DIAappears
flashing on the LCD screen and the error
'Diaphragm break' E-38-3 and the
message
pump stops.
The symbol "Stroke length adjustment"
STRKappears flashing on the LCD screen
'Stroke length mis-
plus the error message
set' E-39-3 and the pump stops.
The symbol "Temperature"
flashing on the LCD screen plus the error
'Temperature FC' E47-4 and the
message
pump stops.
The symbol "Overpressure" p+ FCappears
flashing on the LCD screen plus the error
'Overload FC' E48-4 and the
message
pump stops.
The symbol "Mains"
PWR appears
flashing on the LCD screen plus the error
'Mains voltage' E51-5 and the
message
pump stops.
12.3
Warning Alerts
76
Cause
The liquid level in the
storage tank has reached
"liquid level low 2nd stage".
MEM appears
The stroke memory has
overflown.
The pump is in
'Under
'operating mode' , a fault
behaviour has been pro‐
grammed in the
menu and the control cur‐
rent has fallen below 4 mA.
The pump is in
'operating mode' , a fault
behaviour has been pro‐
grammed in the
menu and the control cur‐
rent has risen above 23
mA.
The dosing monitor is not
correctly connected.
The dosing monitor
reported too few strokes,
more than set in the
'FLOW' menu.
The diaphragm is broken.
The stroke adjustment dial
was rotated by more than
10 % while the menu was
locked.
FCappears
The pump is overloaded.
C
F
The temperature is too
high.
A constriction or a closed
shut-off valve on the dis‐
charge side.
No or incorrect mains
voltage.
Yellow LED indicator "warning indicator" lights up:
Remedy
Fill the storage tank
Rectify the cause, then
[P/OK] key (think
press the
through the consequences
for the process!).
'Analog'
Clear the cause of the low
control current or
'ANALOG'
'Analog'
Clear the cause of the high
control current or
'ANALOG'
Connect the dosing monitor
correctly and
[P/OK] key.
Press the
Press the
[P/OK] key.
Investigate and clear the
cause
Replace the diaphragm and
clean the diaphragm rupture
sensor, refer to the "Repair"
chapter.
Turn the stroke adjustment
dial back or enter the pass‐
word.
Rectify the cause, then
[P/OK] key (think
press the
through the consequences
for the process!).
Rectify the cause, then
[P/OK] key (think
press the
through the consequences
for the process!).
Open the shut-off valve or
clear the constriction, then
press the
[P/OK] key (think
through the consequences
for the process!).
Connect the correct mains
voltage.
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