Troubleshooting - ProMinent EXtronic EXBb Operating Instructions Manual

Troubleshooting

10 Troubleshooting
Safety information
Fault description
Pump does not prime in
spite of full stroke motion
and bleeding.
Diaphragm rupture
warning system issues an
alarm
Pump not metering even
though the operating indi‐
cator is flashing
36
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.
–
–
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.
–
–
Cause
Minor crystalline deposits
on the ball seat due to the
valves drying out.
Heavy crystalline deposits
on the ball seat due to the
valves drying out.
Metering diaphragm rup‐
tured and alarm has not
sounded.
The metering diaphragm is
ruptured.
Cable of diaphragm rup‐
ture sensor is broken.
Stroke length too low
Air is trapped in the liquid
end WITHOUT bleed
valve
Air is trapped in the liquid
end WITH bleed valve
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.
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.
Remedy
Take the suction hose out of
the storage tank and thor‐
oughly flush out the liquid
end.
Dismantle the valves and
clean them - refer to "Repair".
Immediately replace metering
diaphragm - refer to "Repair".
Immediately replace metering
diaphragm - refer to "Repair".
Replace entire diaphragm
rupture sensor.
Increase stroke length with
the stroke length control knob
(14).
Bleed discharge side via a
bleeder valve or relief valve.
Use the bleed valve to bleed.
Personnel
Technical per‐
sonnel
Technical per‐
sonnel
Technical per‐
sonnel
Technical per‐
sonnel
Electrical techni‐
cian with addi‐
tional explosion
protection qualifi‐
cation
Technical per‐
sonnel
Technical per‐
sonnel
Technical per‐
sonnel