Grundfos SMART Digital S DDC Series, Инструкция по установке и эксплуатации

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English (GB)
31
8.1.2 General faults
9. Disposal
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.
Subject to alterations.
Fault Possible cause Possible remedy
Dosing flow too high
Inlet pressure greater than
backpressure
Install additional spring-loaded valve
(approx. 3 bar) on the discharge side.
Increase pressure differential.
Incorrect calibration
Calibrate the pump
(see section
5.3 Calibrating the pump ).
No dosing flow or
dosing flow too low
Air in dosing head Deaerate the pump.
Faulty diaphragm
Change the diaphragm
(see section
7.4 Perform service ).
Leakage/fracture in lines Check and repair lines.
Valves leaking or blocked Check and clean valves.
Valves installed incorrectly
Check that the arrow on the valve housing is
pointing in the direction of flow. Check whether all
O-rings are installed correctly.
Blocked suction line Clean suction line/install filter.
Suction lift too high
Reduce suction lift.
Install priming aid.
Enable "
SlowMode
" (see section 6.5
SlowMode
).
Viscosity too high
Enable "
SlowMode
" (see section 6.5
SlowMode
).
Use hose with larger diameter.
Install spring-loaded valve on the discharge side.
Faulty calibration
Calibrate the pump
(see section
5.3 Calibrating the pump ).
Deaeration valve open Close the deaeration valve.
Irregular dosing
Valves leaking or blocked
Tighten up valves, replace valves if necessary
(see section
7.4 Perform service ).
Backpressure fluctuations Keep backpressure constant.
Liquid escaping from
the drain opening on
the flange
Faulty diaphragm
Immediately separate the pump from the power
supply!
Observe section
7. Service and especially section
7.6 Diaphragm breakage .
Liquid escaping
Dosing head screws not
tightened Tighten up screws
(see section
4.2 Hydraulic connection ).
Valves not tightened
Tighten up valves/union nuts
(see section
4.2 Hydraulic connection ).
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
7.4 Perform service ).