15.2 Fault Messages
In the event of a fault:
n The red LED display lights up.
n A message and a symbol then appear on the LCD screen.
n The pump stops.
Fault description Cause Remedy Personnel
The identifier appears fol‐
lowed by the message
‘Level
error!’
The fluid level in the storage
tank has reached "Liquid level
low 2nd stage".
Fill the storage tank. Technical
personnel
The
‘Storage tank overflow’
message appears.
The stroke memory has over‐
flowed.
Remedy the cause (such as too low
a factor, too high a contact fre‐
quency ...), then:
Press the
[Clickwheel]
(think of the
consequences for the process!).
Technical
personnel
The identifier
appears fol‐
lowed by the message
‘Input
signal < 4 mA’
.
The pump is in
‘Analogue’
operating mode, a fault behav‐
iour has been programmed in
the
‘Analogue’
menu and the
control current has fallen below
4 mA.
Clear the cause of the low control
current or
switch the programming of the fault
behaviour to
‘off’
- see chapter "Set
Up"-"Settings"-"Operating
mode"-"Analogue".
Technical
personnel
The identifier
appears fol‐
lowed by the message
‘Input
signal > 20 mA’
.
The pump is in
‘Analogue’
operating mode, a fault behav‐
iour has been programmed in
the
‘Analogue’
menu and the
control current has risen above
20 mA.
Clear the cause of the high control
current or
switch the programming of the fault
behaviour to
‘off’
- see chapter "Set
Up"-"Settings"-"Operating
mode"-"Analogue".
Technical
personnel
The identifier
appears fol‐
lowed by the message
‘Control
signal < Imin’
.
The pump is in
‘Analogue’
operating mode-"xx side band",
a fault behaviour has been pro‐
grammed in the
‘Analogue’
menu and the control current
has fallen below 4 mA.
Clear the cause of the low control
current or
switch the programming of the fault
behaviour to
‘off’
- see chapter "Set
Up"-"Settings"-"Operating
mode"-"Analogue".
Technical
personnel
The identifier
appears fol‐
lowed by the message
‘Control
signal > Imax’
.
The pump is in
‘Analogue’
operating mode-"xx side band",
a fault behaviour has been pro‐
grammed in the
‘Analogue’
menu and the control current
has risen above 20 mA.
Clear the cause of the high control
current or
switch the programming of the fault
behaviour to
‘off’
- see chapter "Set
Up"-"Settings"-"Operating
mode"-"Analogue".
Technical
personnel
The identifier
appears fol‐
lowed by the message
‘Defective stroke metering’
.
The dosing monitor reported
more defective strokes than was
set in the
‘Inputs/Outputs’
menu.
Press the
[Clickwheel]
.
Investigate and clear the cause.
The identifier
appears fol‐
lowed by the message
‘Diaphragm rupture’
.
The diaphragm is broken. Replace the diaphragm and clean
the diaphragm rupture indicator,
refer to the "Repair" chapter.
Technical
personnel
The identifier
appears fol‐
lowed by the message
‘Overload ’
.
The pump has detected too high
a back pressure.
Rectify the cause. Technical
personnel
The identifier
"Temperature"
appears followed by the mes‐
sage
‘Temperature’
and the
pump remains idle.
The ambient temperature is too
high.
Lower the ambient temperature.
The pump starts up automatically.
Technical
personnel
The temperature is too high. Rectify the cause. The pump starts
up automatically.
Technical
personnel
The identifier
appears fol‐
lowed by the message
‘Air in
dosing head’
.
Gas bubbles in the liquid end
(leaks, gaseous medium, cavita‐
tion).
Bleed the liquid end and rectify the
cause. Seal the system or slow the
suction stroke.
Technical
personnel
Troubleshooting
74
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