ProMinent EXtronic EXBb - Troubleshooting Common Issues; Priming, Metering, and Indicator Faults

10 Troubleshooting
WARNING!
Warning of hazardous feed chemical
Should a dangerous feed chemical be used: it may
escape from the hydraulic components when
working on the pump, material failure or incorrect
handling of the pump.
– Take appropriate protective measures before
working on the pump (e.g. safety glasses,
safety gloves, ...). Adhere to the material safety
data sheet for the feed chemical.
–
Drain and flush the liquid end before working
on the pump.
CAUTION!
Warning of feed chemical spraying around
Feed chemical can spray out of the hydraulic com‐
ponents if they are manipulated or opened due to
pressure in the liquid end and adjacent parts of the
system.
– Disconnect the pump from the mains power
supply and ensure that it cannot be switched
on again by unauthorised persons.
–
Depressurise the system before commencing
any work on hydraulic parts.
Fault description Cause Remedy Personnel
Pump does not prime in
spite of full stroke motion
and bleeding.
Minor crystalline deposits
on the ball seat due to the
valves drying out.
Take the suction hose out of
the storage tank and thor‐
oughly flush out the liquid
end.
Technical per‐
sonnel
Heavy crystalline deposits
on the ball seat due to the
valves drying out.
Dismantle the valves and
clean them - refer to "Repair".
Technical per‐
sonnel
Metering diaphragm rup‐
tured and alarm has not
sounded.
Immediately replace metering
diaphragm - refer to "Repair".
Technical per‐
sonnel
Diaphragm rupture
warning system issues an
alarm
The metering diaphragm is
ruptured.
Immediately replace metering
diaphragm - refer to "Repair".
Technical per‐
sonnel
Cable of diaphragm rup‐
ture sensor is broken.
Replace entire diaphragm
rupture sensor.
Electrical techni‐
cian with addi‐
tional explosion
protection qualifi‐
cation
Pump not metering even
though the operating indi‐
cator is flashing
Stroke length too low Increase stroke length with
the stroke length control knob
(14).
Technical per‐
sonnel
Air is trapped in the liquid
end WITHOUT bleed
valve
Bleed discharge side via a
bleeder valve or relief valve.
Technical per‐
sonnel
Air is trapped in the liquid
end WITH bleed valve
Use the bleed valve to bleed. Technical per‐
sonnel
Safety information
Troubleshooting
36