32
EN 5675-L
12�10 Cleaning
If the pump is used for transportable applications, then in order to avoid deposits of dirt and encrustation it
that the functioning of the automatic level control system be checked regularly. By switching the selection switch
be cleaned. After cleaning, the pump should be rinsed out with clear water and a number of automatic pumping
cycles carried out.
13 Troubleshooting Guide
Fault Cause Fix
Pump does not
run
Moisture sensor shutdown. Check for loose or damaged oil plug, or locate and
replace faulty mechanical seal / damaged o-rings.
Change oil.
1)
Air lock in volute Shake or raise and lower the pump repeatedly
until resulting air bubbles no longer appear at
surface level.
Level control override.
held in OFF position in sump.
Impeller jammed. Inspect and remove jammed object. Check gap
between impeller and bottom plate and adjust if
necessary.
Gate valve closed, non-return valve
blocked.
Open gate valve, clean blockage from non-return
valve.
intermittently
Temperature sensor shutdown. Motor will restart automatically when pump cools
down.
Check thermal relay settings in control panel.
Check for impeller blockage.
If none of above, a service inspection is required.
1)
Wrong direction of rotation. Change rotation by interchanging two phases of
the power supply cable.
Gap too wide between impeller and
bottom plate
Reduce gap (see page 30).
Gate valve partially open. Open valve fully.
Excessive noise or
vibration
Defective bearing. Replace bearing.
1)
Clogged impeller. Remove and clean hydraulics. See also Section
12.9.
Wrong direction of rotation. Change rotation by interchanging two phases of
the power supply cable.
Before commencing any inspection or repair work the pump should be completely disconnected from the
1)
Pump must be taken to approved workshop.
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