KNF Laboport N811 KN.18, Руководство по эксплуатации

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Mini Laboratory pumps N 86.18, N 811.18 Troubleshooting
Translation of original Operating Instructions, English, KNF 121435-121438 04/18 23
9. Troubleshooting
DANGER
Extreme danger from electrical shock!

Disconnect the pump power supply before working
on the pump.

Make sure the pump is de-energized and secure.

Check the pump (see Tab. 12 to 15).
Pump produces no flow
Cause Fault remedy
No voltage in the power source

Check room fuse and switch on if necessary.
Thermal switch has operated
following to over-heating.

Disconnect pump from mains.

Allow pump to cool.

Trace cause of over-heating and eliminate it.
Connections or lines blocked.

Check connections and lines.

Remove blockage.
External valve is closed or filter is
clogged.

Check external valves and filters.
Condensate has collected in pump
head.

Detach the condensate source from the pump.

Flush pump (see chapter 8.2.1).
Diaphragm or valve
plates/sealings (valve plates) are
worn.

Replace diaphragm and valve plates/sealings (valve
plates) (see chapter 8.3).
Tab. 12
Flow rate, pressure or vacuum too low
The pump does not achieve the output specified in the Technical data or the data sheet.
Cause Fault remedy
Condensate has collected in pump
head.

Detach the condensate source from the pump.

Flush pump (see chapter 8.2.1).
There is gauge pressure on pres-
sure side and at the same time
vacuum or a pressure above
atmospheric pressure on suction
side.

Change the pressure conditions.
Pneumatic lines or connection
parts have an insufficient cross
section.

Disconnect pump from system to determine output values.

Eliminate throttling (e.g. valve) if necessary.

Use lines or connection parts with larger cross section if
necessary.
Leaks occur on connections, lines
or pump head.

Check that tubes sit correctly on hose nozzles.

Replace leaky tubes.

Eliminate leaks.
Connections or lines completely or
partially jammed.

Check connections and lines.

Remove the jamming parts and particles.
Head parts are soiled.

Clean head components.
Diaphragm or valve
plates/sealings (valve plates) are
worn.

Replace diaphragm and valve plates/sealings,
(valve plates) (see chapter 8.3).
DE
EN
FR
ES
IT