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9. Disposal
This product or parts of it must be disposed
of in an environmentally sound way.
Use appropriate waste collection services.
If this is not possible, contact the nearest Grundfos
company or service workshop.
Subject to alterations.
Irregular dosing
Valves leaking or blocked
Tighten up valves, replace valves if necessary
(see section
Backpressure fluctuations
Keep backpressure constant.
Activate "
AutoFlowAdapt
" (only DDA-FCM).
Liquid escaping from
the drain opening on
the flange
Faulty diaphragm
Immediately separate the pump from the power
supply!
Observe section
and especially section
Liquid escaping
Dosing head screws not
tightened
Tighten up screws (see section
Valves not tightened
Tighten up valves/union nuts (see section
Pump not sucking in
Suction lift too high
Reduce suction lift; if necessary, provide positive
inlet pressure.
Backpressure too high
Open the deaeration valve.
Soiled valves
Flush system, replace valves if necessary (see
section
Fault
Possible cause
Possible remedy