Lutz-Jesco MAGDOS LP, Руководство по эксплуатации

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Troubleshooting
Type of fault
52
Solenoid-Diaphragm Dosing Pump MAGDOS LP
© Lutz-Jesco GmbH 2014
Operating Instructions
BA-10231-02-V03
13 Troubleshooting
See below for information about how to rectify faults on the device or
the system. If you cannot eliminate the fault, please consult with the
manufacturer on further measures or return the dosing pump for repair.
13.1 Type of fault
13.1.1 Dosing pump not delivering or output too low
13.1.2 Dosing pump does not prime
Possible cause Remedy
Wrong type of dosing pump
selected

Check the dosing pump's tech-
nical data and if necessary
select a type with a higher
delivery capacity.
Valve leaking or blocked

Clean the valve and vent the
dosing pump.

Tighten the screw connections.
Valve installed incorrectly

Reassemble the valve. Ensure
that the valve balls are located
above the valve seats.
Valve damaged (e.g. valve
balls)

Remove the damaged parts or
install a new valve.
Suction line is leaking

Seal the leak locations or
replace the parts.
Suction line is blocked (e.g.
screen in foot valve)

Clean the suction line
Shut-off valves closed

Open the shut-off valves Inspect
the dosing pump for possible
damage.
Suction head too high

Set the dosing pump to feed or
reduce the suction head.

Install a priming aid.
Viscosity too high

Possibly reduce the concentra-
tion of the dosing medium or
increase the temperature.

Install spring-loaded valves.

Increase the pipe diameter.
Current supply interrupted

Reconnect the current supply
The dosing pump's electrical
data does not match that of
the mains supply

Check the electrical installation.
Eco-Mode set (driving power
reduced)

Switch off Eco-Mode.
Table 13-1: Type of fault: Dosing pump not delivering or output too low
System back pressure too
high (measured at discharge
connection of dosing pump)

Clean blocked injection nozzle.

Install pulsation dampeners to
reduce pressure peaks if pipes
are too long.

Check function of safety valves.
Possible cause Remedy
Valve leaking or blocked

Clean the valve and vent the
dosing pump.

Tighten the screw connections.
Valve installed incorrectly

Reassemble the valve. Ensure
that the valve balls are located
above the valve seats.
Valve damaged (e.g. valve
balls)

Remove the damaged parts or
install a new valve.
Suction line is leaking

Seal the leak locations or
replace the parts.
Suction line is blocked (e.g.
screen in foot valve)

Clean the suction line
Shut-off valves closed

Open the shut-off valves Inspect
the dosing pump for possible
damage.
Suction head too high

Set the dosing pump to feed or
reduce the suction head.

Install a priming aid.
Viscosity too high

Possibly reduce the concentra-
tion of the dosing medium or
increase the temperature.

Install spring-loaded valves.

Increase the pipe diameter.
Current supply interrupted

Reconnect the current supply
Dry the valves

Dampen the dosing head and
the valves

Vent the dosing head.
Air in the suction line with
simultaneous pressure on the
discharge valve

Vent the dosing head or the
lines.
Table 13-2: Type of fault: Dosing pump does not prime
Possible cause Remedy
Table 13-1: Type of fault: Dosing pump not delivering or output too low