Fault Finding Chart; Disposing Of The Product - Grundfos DME 60 AR Installation And Operating Instructions Manual

9. Fault finding chart

Fault
The dosing has stopped
or the output is too low.
Pump dosing too little or
too much.
Pump dosing irregularly. Valves leaking or blocked.
Leakage from drain
hole.
Frequent diaphragm
failures.
Related information
5.15 Anti-cavitation
7. Calibration

10. Disposing of the product

This product or parts of it must be disposed of in an
environmentally sound way.
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
40
Cause
Valves leaking or blocked.
Valves incorrectly installed.
Suction valve or suction pipe/hose
leaking or blocked.
Suction lift too high.
Viscosity too high.
Pump out of calibration.
Pump out of calibration.
Diaphragm defective.
Diaphragm not fastened properly.
Counter-pressure too high
(measured at the pump discharge
port).
Sediment in dosing head.
Remedy
Check and clean the valves.
Remove and fit valves. Check that the arrow on
the valve casing is pointing in the liquid flow
direction. Check that all O-rings have been
fitted correctly.
Clean and seal the suction pipe/hose.
Install the pump in a lower position.
Install a priming tank.
Select the anti-cavitation function, see section
Anti-cavitation.
Install a pipe/hose with larger cross-section.
Fit spring-loaded valves.
Calibrate the pump, see section Calibration.
Calibrate the pump, see section Calibration.
Check and clean the valves.
Install a new diaphragm.
Install a new diaphragm and ensure that the
diaphragm is fastened properly.
Check the system. Check the injection valve.
Clean/flush the dosing head.
The crossed-out wheelie bin
symbol on a product means
that it must be disposed of
separately from household
waste. When a product
marked with this symbol
reaches its end of life, take it
to a collection point
designated by the local waste
disposal authorities. The
separate collection and
recycling of such products will
help protect the environment
and human health.
See also end-of-life information at
www.grundfos.com/product-recycling.