English (GB)
71
12. Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use appropriate waste collection services.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
4.
Dosing flow of the
pump is
inaccurate.
a)
Dosing head not fully deaerated.
Repeat the deaeration.
b)
Degassing medium.
Check the installation.
c)
Parts of the valves covered in dirt or
incrusted.
Clean the valves.
d)
Counter-pressure fluctuations.
Install a pressure-loading valve and a
pulsation damper, if necessary.
e)
Suction lift fluctuations.
Keep the suction level constant.
f)
Siphon effect (inlet pressure higher
than counter-pressure).
Install a pressure-loading valve.
g)
Leaking or porous suction line or
discharge line.
Replace the suction line or discharge
line.
h)
Parts in contact with the medium
are not resistant to it.
Replace with resistant materials.
i)
Dosing diaphragm worn (incipient
tears).
Replace the diaphragm. Also observe
the maintenance instructions.
j)
Variation of the dosing medium
(density, viscosity).
Check the concentration. Use an
agitator, if necessary.
5.
Loud, piercing
noises.
a)
At dosing capacities lower than
10 % of the maximum dosing
capacity of the pump, resonance
noises may temporarily occur at the
stepper motor.
The resonance noise of the stepper
motor does not indicate an error.
6.
Liquid leaks out of
the hole in the
intermediate flange
between the pump
and the dosing
head.
a)
A diaphragm leakage has occurred. Replace the diaphragm.
Fault
Cause
Remedy
Note
For further error signals for the control unit, refer to the relevant section.
Subject to alterations.
Содержание DDI 209
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