KNF PJ25481-950.50.18, Оригинальная инструкция по установке

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Troubleshooting Diaphragm pump PJ25481-950.50.18
28 Translation of original Installation Instructions, english, KNF 125530-316634 06/18
9. Troubleshooting
DANGER
Extreme danger from electrical shock!

Disconnect the pump power supply before work-
ing on the pump.

Make sure the pump is de-energized and se-
cure.

Check the pump (see Tab. 12 and Tab. 13).
Pump does not transfer
Cause Fault remedy
Pump not connected to the
mains.

Connect pump to the mains.
No voltage in the mains.

Check room fuse and switch on if necessary.

The motor board’s overcur-
rent protection circuit has
activated.

Maximum temperature of
motor board is exceeded.

Maximum blocking time of
the rotor is exceeded.

Separate pump from the mains.

Determine and remove the cause of the overcurrent (for ex-
ample: improper pressure, liquid in the pump heads).
The pump must be separated from the mains for several
seconds before the electronics will permit restarting.
Connections or hoses are
blocked.

Check hoses and connections.

Remove blockage.
External valve is closed or filter
is clogged.

Check external valves and filters.
Condensate has collected in the
pump head.

Detach the condensate source from the pump.

Flush the pump (see Chapter 8.2.1).
Diaphragm or valve plates are
worn.

Replace diaphragm and 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 the
pump head.

Detach the condensate source from the pump.

Flush the pump (see Chapter 8.2.1).
Presence of positive pressure
on the pressure side with simul-
taneous vacuum or positive
pressure on the suction side.

Change the pressure conditions.
Cross-section of pneumatic
hoses or connectors too narrow
or restricted.

Disconnect the pump from system and determine output
values.

Remove restriction (e.g. valve) if necessary.

If applicable, use larger-diameter hoses or connectors.
Leaks in connections, hoses or
pump head.

Make sure the hoses and connections.

Remove any parts or particles causing blockages.
Pump head components are
soiled.

Clean head components.