Fault description
Cause
Remedy
Personnel
Pump does not prime
despite full stroke motion
and degassing.
Serious crystalline
deposits on the ball seat
due to the valves drying
out.
Dismantle the valves and clean
them - refer to "Repair".
Technical per‐
sonnel
Fluid escapes from the
backplate.
The screws in the dosing
head are too loose.
Tighten the screws in the dosing
head crosswise - refer to "Repair"
for the tightening torque.
Instructed per‐
sonnel
The metering diaphragm
is not leak-tight.
Replace the metering diaphragm
- refer to "Repair".
Technical per‐
sonnel
Green LED display
(operating indicator)
does not light up.
The wrong supply voltage
or no supply voltage is
connected.
Connect the pump correctly to
the specified supply voltage -
according to the specification on
the nameplate.
Electrician
14.2 Fault messages
Fault description
Cause
Remedy
Personnel
Red LED display (fault
indicator) lights up and
the pump stops.
The fluid level in the supply tank has
reached "Liquid level low 2nd stage".
Top up the supply tank. Instructed
personnel
The pump is in "External Analogue"
operating mode and the control current
has risen above 23 mA (fault signal).
Clear the cause of the
fault on the pump.
The pump is in "External Analogue"
operating mode, set to "4-20 mA" and
the control current has fallen below 4
mA.
Clear the cause of the
low control current (e.g.
cable break).
The multifunctional switch is not turned
to "External" but an external cable is
connected and the pump has the iden‐
tity code characteristic "Control type" -
"1": "with lock".
Either turn the multi‐
functional switch to
"External" or remove
the External cable from
the pump.
Technical
personnel
14.3 Warning messages
Fault description
Cause
Remedy
Personnel
Yellow LED display (warning
indicator) lights up.
The fluid level in the supply tank
has reached "Liquid level low 1st
stage".
Top up the supply
tank.
Instructed per‐
sonnel
14.4 All other errors
Please contact the responsible ProMinent branch or representa‐
tive!
Troubleshooting
52
